Notes

Extra Practice for Extra Credit Wk01
Section is due on Mon Oct 9, 2023 11:59 PM (6 days from now)
Please read the sections below, and answer the questions that follow .
Extra Practice for Extra Credit Instructions
This section contains the weekly optional extra practice for extra credit problems (EP4EC). These problem are not required but recommended for anyone who feels they could use extra practice. To encourage the extra effort, A small amount of extra credit will be added at the end of the quarter based on the total percentage of correctly completed EP4EC problems (see syllabus for details). The assignment closes at 11:59pm of the listed due date. The deadline is a hard deadline and no individual extension are permitted.



Multiple-choice questions are allowed 2 attempts.

Numerical-answer questions are allowed 5 attempts.

Hints, if available, will be accessible after your first attempt.

Solutions, if available, will be accessible only after the deadline for the homework set has passed.



Each correctly answered question (or question part for multi-part question) is worth one EP4EC point. All EP4EC points are summed at the end of the quarter and the appropriate weighting and "emergency/illness" forgiveness policy will be applied as outlined in this quarter's syllabus. Only correct answers to EP4EC answer count toward the extra credit score.





Hide Stats and Solutions
Questions are due on Mon Oct 9, 2023 11:59 PM (6 days from now)
Question 1
(1 points)

(#825076) {Dimensional Analysis}



Speed is a quantity that describes how fast an object is moving. The (average) speed is defined as the distance traveled by the object divided by its traveling time. What's are the dimensional units of speed?

Select the correct answer
[M][T]
[L][T]
[L]/[T]
[M]/[T]
[T]/[L]
No answer submitted
0 of 2 checks used

Question 2
(1 points)

(#807346) {Dimensional Analysis}



Based on dimensional analysis, which of the following formulas could NOT potentially be a proper formula for the volume of a tetrahedron (i.e., a triangular pyramid) with an edge length of,
�
d, a base area of
�
A ,and a height of
ℎ
h?





Select the correct answer
�
=
2
1
2
�
3
V=
​12
​
​√
​2
​
​​
​​ d
​3
​​
�
=
4
2
9
�
2
�
V=
​9
​
​4√
​2
​
​​
​​
​d
​
​A
​2
​​
​​
�
=
3
�
2
V=√
​3
​
​​ d
​2
​​
�
=
6
9
�
�
V=
​9
​
​√
​6
​
​​
​​ Ad
�
=
1
3
�
ℎ
V=
​3
​
​1
​​ Ah
No answer submitted
0 of 2 checks used

Question 3
(1 points)

(#455456) {Unit Conversion}



Select the set of terms that appropriately completes the following statement about conversion factors:



"A conversion factor is a ratio of two values that can be of different _____(a)_____, but must be of the same ______(b)______. To perform unit conversion, we can _____(c)______ a value with the appropriate conversion factor(s).

Select the correct answer
(a) systems of units ; (b) unit dimensions ; (c) multiply
(a) systems of units ; (b) unit dimensions ; (c) sum
(a) unit dimensions ; (b) system of units ; (c) sum
(a) unit dimensions ; (b) system of units ; (c) multiply
No answer submitted
0 of 2 checks used

Question 4
(1 points)

(#421566) {Unit Conversion}



Consider the price of gas in France to be 1.3 euros per liter. If a visitor has 50 euros, how many gallons can be purchased (there are 4 quarts per gallon and a liter is ~ 1 quart)?

Select the correct answer
~ 12 gallons
~ 6 gallons
~ 10 gallons
~ 8 gallons
~ 7 gallons
No answer submitted
0 of 2 checks used

Question 5
(1 points)

(#762004) {Unit Conversion}



The speed of a car is found by dividing the distance traveled by the time required to travel that distance. Consider a car that traveled 26.0 miles in 1.62 hours. What's the speed of car in km/h (kilometer per hour)?





Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8

Enter answer here
km/h
No answer submitted
0 of 5 checks used

Question 6
(1 points)

(#032176) {Unit Conversion}



The radius of the moon is 1079 miles. Which of the following is equal to the surface area of the moon in units of
�
2
m
​2
​​ ? ( 1 mile = 1609 meters; you will need to recall how to find the surface area of a sphere.)

Select the correct answer
9
.
5
×
1
0
1
2
9.5×10
​12
​​ m
2
​2
​​
3
.
8
×
1
0
1
3
3.8×10
​13
​​ m
2
​2
​​
2
.
4
×
1
0
1
0
2.4×10
​10
​​ m
2
​2
​​
1
.
9
×
1
0
1
3
1.9×10
​13
​​ m
2
​2
​​
No answer submitted
0 of 2 checks used

Question 7
(1 points)

(#063129) {Unit Conversion}



The body mass index (BMI) is a measure of relative size commonly used to assess how much one's body weight differs from what is considered to be a healthy range for a person's height. The measure is defined as,
B
M
I
=
m
a
s
s
(
h
e
i
g
h
t
)
2
BMI=
​(height)
​2
​​
​
​mass
​​ . What is the BMI of a 60.6 inch tall adult with a weight of 138 lbs when written in SI units of
k
g
m
2
​m
​2
​​
​
​kg
​​

Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8

Enter answer here
k
g
m
2
​m
​2
​​
​
​kg
​​
No answer submitted
0 of 5 checks used

Question 8
(1 points)

(#991235) {Significant Figures}



Which of the following statements about significant figures in a reported measurement is false?



Select the correct answer
Zeroes between other digits are always significant
Trailing zeros are significant if any of the zeros are to the right of the decimal point.
The significance of trailing zeros is ambiguous if all the trailing zeros are to the left of the decimal point.
Preceding zeros to the right of the decimal point are significant.
Preceding zeros to the left of the decimal point are not significant.
No answer submitted
0 of 2 checks used

Question 9
(1 points)

(#453949) {Significant Figures}



How many significant figures are there in the following values:
3
.
7
×
1
0
3
3.7×10
​3
​​ ,
3
.
7
0
×
1
0
3
3.70×10
​3
​​ ,
0
.
0
0
4
0
6
0.00406 ,
1
2
0
0
.
4
0
1200.40?

Select the correct answer
2 , 3 , 3 , 6
3 , 3 , 6 , 6
2 , 3 , 6 , 6
2 , 3 , 5 , 6
3 , 3 , 3 , 3
No answer submitted
0 of 2 checks used

Question 10
(1 points)

(#733891) {Significant Figures}



What is the correct way to report the sum of the following values: 2.22 g + 10.51 g + 0.3 g + 532.1 g

Select the correct answer
550 g
545 g
545.1 g
545.13 g
545.2 g
No answer submitted
0 of 2 checks used

Question 11
(1 points)

(#467720) {Uncertainty}

Pat has received a several bags of gummy bears with each bag indicating that there are 30 pieces in each bag. He opens the bags and counts the contents to discover that each bag had significantly different amounts of gummy bears (some bags have several more than 30, but an equal number of bags have several less than 30). After opening 10 bags, Pat has a pile of 302 gummy bears. What can be said about the machine that counts out the gummy bears into the bags at the factory?



Select the correct answer
The machine is fairly accurate and fairly precise
We cannot say any of the above about the machine.
The machine is neither very accurate nor very precise
The machine is fairly accurate but not very precise
The machine is fairly precise but not very accurate
No answer submitted
0 of 2 checks used

Question 12
(1 points)

(#661697) {Uncertainty}



A average doubling time of a particular bacterial population in a certain incubation medium is measured to be 1.16e+3 seconds. The percent uncertainty in this reading is reported to be
±
± 4.54 %. What is the absolute uncertain of the reading in seconds?





Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8

Enter answer here
s
No answer submitted
0 of 5 checks used

Question 13
(1 points)

(#324617) {Approximation}



Estimate the volume of your physics lab manual. (The lab manual is roughly as thick as the width of your thumb, and made of standard sized printer paper).

Select the correct answer
1
0
0

c
m
2
100 cm
​2
​​
1
0
0

c
m
3
100 cm
​3
​​
1
0
0
0

c
m
3
1000 cm
​3
​​
1
0
0
0

c
m
2
1000 cm
​2
​​
1
0

c
m
3
10 cm
​3
​​
No answer submitted
0 of 2 checks used

Question 14
(1 points)

(#423904) {Position, Velocity, Acceleration} / {Speed vs. Velocity}



True or False : If a car drives on a road for a nonzero amount of time, then its average velocity must be nonzero.

Select the correct answer
False
True
No answer submitted
0 of 1 checks used
LAST ATTEMPT!

Question 15
This question contains multiple parts. Make sure to read all the instructions and answer each part.

(#518274) {Position, Velocity, Acceleration} / {Speed vs. Velocity}



Evaluate the following statements about speed and velocity.



Part a
(1 points)
True or false : It is possible to have a negative speed.

Select the correct answer
True
False
No answer submitted
0 of 1 checks used
LAST ATTEMPT!
Part b
(1 points)
True or false : It is possible to have a negative velocity.

Select the correct answer
True
False
No answer submitted
0 of 1 checks used
LAST ATTEMPT!

Question 16
(1 points)

(#897074) {Position, Velocity, Acceleration} / {Speed vs. Velocity}



Florence Griffith-Joyner ran the 200m women's sprint in 21.34s in the 1988 Seoul Olympics, to this date the fastest sprint time for this event. Which of the following statements about her speed and velocity must be true?

Image size: SMLMax



Select the correct answer
Her average speed must be positive, but her average velocity must be negative.
Her average speed must be negative, but her average velocity must be positive.
Both her average speed and her average velocity must be positive.
Her average velocity must be positive, but the sign of her average speed depends on which direction we label as positive and which direction we label as negative.
Her average speed must be positive, but the sign of her average velocity depends on which direction we label as positive and which direction we label as negative.
Both her average speed and her average velocity must be negative.
No answer submitted
0 of 2 checks used

Question 17
(1 points)

(#825436) {Position, Velocity, Acceleration} / {Position-Velocity Relationship}



If the displacement of an object,
�
x, is related to time,
�
t, by the following relationship :
�
=
�
�
x=At, then what are the unit dimensions of the constant,
�
A?

Select the correct answer
velocity
acceleration
area
length
time
No answer submitted
0 of 2 checks used

Question 18
(1 points)

(#232602) {Position, Velocity, Acceleration}



Which of the following quantities best describes the rate of change in your position?

Select the correct answer
Displacement
Acceleration
Velocity
Time
No answer submitted
0 of 2 checks used

Question 19
(1 points)

#060359 {Fundamental Units}



Which of the following is not the unit dimension (and symbol) for one of the fundamental unit in physics?

Select the correct answer
Volume [V]
Mass [M]
Length [L]
Time [T]
Electric Current [I]
No answer submitted
0 of 2 checks used

Question 20
(1 points)

#429058 {Dimensional Analysis}



Which of the following mathematical operations are and are not not allowed on two quantities with different unit dimensions?

Select the correct answer
Allowed : Addition, Subtraction , Not Allowed : Multiplication, Division, Equality
Allowed : Multiplication, Division, Equality , Not Allowed : Addition, Subtraction
Allowed : Addition, Multiplication , Not Allowed : Subtraction, Division, Equality
Allowed : Addition, Subtraction, Equality , Not Allowed : Multiplication, Division
Allowed : Multiplication, Division , Not Allowed : Addition, Subtraction, Equality
No answer submitted
0 of 2 checks used

Question 21
(1 points)

(#780887) {Unit Conversion}



Calculate the number of times an average person's heart beats in a lifetime. Assume the average heart rate is 57.1 beats/min and a lifespan of 82.3 years.

Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8

Enter answer here
No answer submitted
0 of 5 checks used

Question 22
(1 points)

(#525234) {Significant Figures}



What is the appropriate way to report the result of the following multiplication : A = 3.56 cm x 1,230 cm ?

Select the correct answer
4
3
7
9

c
m
2
4379 cm
​2
​​ (
4
.
3
7
9
×
1
0
3

c
m
2
4.379×10
​3
​​ cm
​2
​​ )
4
3
7
8
.
8
0

c
m
2
4378.80 cm
​2
​​ (
4
.
3
7
8
8
0
×
1
0
3

c
m
2
4.37880×10
​3
​​ cm
​2
​​ )
4
3
8
0

c
m
2
4380 cm
​2
​​ (
4
.
3
8
×
1
0
3

c
m
2
4.38×10
​3
​​ cm
​2
​​ )
4
4
0
0

c
m
2
4400 cm
​2
​​ (
4
.
4
×
1
0
3

c
m
2
4.4×10
​3
​​ cm
​2
​​ )
4
3
7
8
.
8

c
m
2
4378.8 cm
​2
​​ (
4
.
3
7
8
8
×
1
0
3

c
m
2
4.3788×10
​3
​​ cm
​2
​​ )
No answer submitted
0 of 2 checks used

Question 23
(1 points)

(#092464) {Position, Velocity, Acceleration} / {Position-Velocity Relationship}



A student drove to the university from his home and noted that the odometer reading of her car increased by 13.7 miles. The trip took 33.5 min. (Note: 1 mile = 1.6 km).



What was his average speed in km/h?

Select the correct answer
56.6
km/h
27.5
km/h
33.5
km/h
47.5
km/h
39.3
km/h
No answer submitted
0 of 2 checks used

Question 24
(1 points)

(#844549) {Position, Velocity, Acceleration} / {Position-Velocity Relationship}



A particle moves in a straight line at a constant velocity of 30 m/s. What is its displacement between
�
=
0
t=0 and
�
=
5
.
0
t=5.0 s?

Select the correct answer
150 m
187 m
89 m
208 m
47 m
No answer submitted
0 of 2 checks used

Question 25
(1 points)

(#820431) {Position, Velocity, Acceleration} / {Position-Velocity Relationship)



A particle moves along the
�
x-axis according to
�
(
�
)
=
1
0
�
−
2
�
2
x(t)=10t−2t
​2
​​ m. What is the average velocity between
�
=
2
t=2 s and
�
=
3
t=3 s?

Select the correct answer
1.0 m/s
4.0 m/s
-1.0 m/s
0 m/s
2.0 m/s
No answer submitted
0 of 2 checks used

Question 26
(1 points)

(#024256) {Position, Velocity, Acceleration} / {Velocity-Acceleration Relationship}



If a car drives for a nonzero amount of time, then its average acceleration must be nonzero.

Select the correct answer
False
True
No answer submitted
0 of 1 checks used
LAST ATTEMPT!

Question 27
(1 points)

(#931594) {Position, Velocity, Acceleration} / {Velocity-Acceleration Relationship}



A cheetah can accelerate from rest to a speed of 29.7 m/s in 3.84 s. What is the magnitude of its acceleration?

Select the correct answer
1.30
m
/
s
2
m/s
​2
​​
10.1
m
/
s
2
m/s
​2
​​
7.73
m
/
s
2
m/s
​2
​​
4.09
m
/
s
2
m/s
​2
​​
8.63
m
/
s
2
m/s
​2
​​
No answer submitted
0 of 2 checks used

Question 28
(1 points)

(#460784) {Position, Velocity, Acceleration} / {Velocity-Acceleration Relationship}



While entering a freeway, a car accelerates from rest at a rate of
2
.
4

m
/
s
2
2.4 m/s
​2
​​ for 12.0 s. What is the car's final velocity

Select the correct answer
12.8 m/s
28.8 m/s
37.0 m/s
7.9 m/s
19.0 m/s
No answer submitted
0 of 2 checks used

Question 29
(1 points)

(#827123) {{Position, Velocity, Acceleration} / {Velocity-Acceleration Relationship}



The position of an rocket moving along a straight line is given by the following formula :



�
(
�
)
=
(
5
.
3
0

m
/
s
4
)
⋅
�
4
+
(
4
.
1
0

m
/
s
2
)
⋅
�
2
+
(
3
.
2
0

m
)
x(t)=(5.30 m/s
​4
​​ )⋅t
​4
​​ +(4.10 m/s
​2
​​ )⋅t
​2
​​ +(3.20 m)



Calculate the velocity of this object at the instant t = 4.00 seconds



Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8

Enter answer here
m/s
No answer submitted
0 of 5 checks used

Question 30
(1 points)

(#428312) {Position, Velocity, Acceleration} / {Position-Velocity Relationship} / {Velocity-Acceleration Relationship}



The position of an object moving along a straight track is given by the following formula :



�
(
�
)
=
(
2
.
4
0

c
m
/
s
3
)
⋅
�
3
+
(
3
.
5
0

c
m
/
s
2
)
⋅
�
2
+
(
4
.
7
0

c
m
/
s
)
⋅
�
+
(
5
.
3
3

c
m
)
x(t)=(2.40 cm/s
​3
​​ )⋅t
​3
​​ +(3.50 cm/s
​2
​​ )⋅t
​2
​​ +(4.70 cm/s)⋅t+(5.33 cm)



Calculate the acceleration of this object at the instant t = 3.00 seconds



Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8

Enter answer here
cm/s
2
​2
​​
No answer submitted
0 of 5 checks used

Question 31
(1 points)

(#302127) {Interpreting Graphs}



Which of the following graphs represents an object traveling at a constant, non-zero velocity?

Image size: SMLMax



Select the correct answer
b
d
c
a
c and d
No answer submitted
0 of 2 checks used

Question 32
(1 points)

(#986907) {Interpreting Graphs} / {Slope}



Two carts are racing on parallel tracks along the x axis. Estimate the time point when the two carts have the same velocity.



Image size: SMLMax



Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8

Enter answer here
seconds
No answer submitted
0 of 5 checks used

Question 33
(1 points)

(#156506) {Interpreting Graphs} / {Integrated Area}



The figure below shows the velocity-versus-time graph for a soccer player traveling up and down the field in a straight-line path. Find the displacement of the player during the first four seconds.

Image size: SMLMax



Select the correct answer
10 m
3 m
5 m
0 m
No answer submitted
0 of 2 checks used

Question 34
This question contains multiple parts. Make sure to read all the instructions and answer each part.

(#132798) {Interpreting Graphs}



The graph below depicts the velocity of a car as it drives along a straight stretch of a city street.

Image size: SMLMax



Part a
(1 points)
What is the car's velocity at the time
�
=
1
5

s
e
c
o
n
d
s
t=15 seconds?

Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8

Enter answer here
m/s
No answer submitted
0 of 5 checks used
Part b
(1 points)
What is the car's acceleration at time
�
=
1
5

s
e
c
o
n
d
s
t=15 seconds?

Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8

Enter answer here
�
/
�
2
m/s
​2
​​
No answer submitted
0 of 5 checks used
Part c
(1 points)
What is the displacement along this straight city street between times
�
=
0

s
e
c
o
n
d
s
t=0 seconds and
�
=
1
0
0

s
e
c
o
n
d
s
t=100 seconds?

Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8

Enter answer here
meters
No answer submitted
0 of 5 checks used

Question 35
(1 points)

(#357579) {Motion Diagrams}



Which of the following statements are true regarding motion diagrams?



(a) Dots in a motion diagram are placed at equal time intervals.

(b) Dots in a motion diagram are placed at equal distance intervals.

(c) The farther apart two dots appear in a motion diagram, the higher the average speed of the object was between those dots.

(d) The farther apart two dots appear in a motion diagram, the lower the average speed of the object was between those dots.

(e) Dots that are getting progressively further apart indicate that an object is accelerating.



Select the correct answer
Only (a), (c) and (e) are true
Only (a) and (d) are true
Only (a) and (c) are true
Only (b) and (d) are true
Only (b) and (e) are true
Only (c) and (e) are true
No answer submitted
0 of 2 checks used

Question 36
This question contains multiple parts. Make sure to read all the instructions and answer each part.

(#536949) {Motion Diagrams}



Two objects are moving along two parallel tracks as shown in the motion diagram below. Both objects pass Position 1 at the same time, and each object drops a dot at its current location at regular intervals of 1 second. Assume that there are no overlapping dots.

Image size: SMLMax



Part a
(1 points)
Which object is moving with a constant velocity between Position 1 and Position 2?

Select the correct answer
Object A is moving with a constant velocity between Position 1 and Position 2.
Object B is moving with a constant velocity between Position 1 and Position 2.
No answer submitted
0 of 1 checks used
LAST ATTEMPT!
Part b
(1 points)
Which object has the higher average speed between passing Position 1 and arriving at Position 2?

Select the correct answer
Object A has the higher average speed between passing Position 1 and arriving at Position 2
Object B has the higher average speed between passing Position 1 and arriving at Position 2
No answer submitted
0 of 1 checks used
LAST ATTEMPT!

Question 37
(1 points)

(#576103) {Motion Diagrams]



The small circles in the diagram below represent the positions of a body at equal time intervals as it moves along the positive x- axis (to the right) . The numbers above the circles indicate the time point(s) associated with that circle. Assume that the body moves in a straight line. Which of the following scenarios does the diagram most likely describe.



Image size: SMLMax



Select the correct answer
The winning sprinter during a 100 m race.
A bowling ball rolled across the room and then striking some bowling pins.
A student walking to class uninterrupted.
A professor pacing back and forth several times in front of a classroom.
A runner who fell while running, but then got up and continued running.
No answer submitted
0 of 2 checks used

Question 38
(1 points)

(#848769) {Kinematic Equations}



While entering a freeway, a car accelerates from rest at a rate of
2
.
4

m
/
s
2
2.4 m/s
​2
​​ for 12.0 s. How far does the car travel in those 12.0 s?

Select the correct answer
200.0 m
98.40 m
306.1 m
112.3 m
172.8 m
No answer submitted
0 of 2 checks used

Question 39
(1 points)

(#6064990) {Kinematic Equations}



An Olympic-class sprinter starts a race with an acceleration of
4
.
0
8

m
/
s
2
4.08 m/s
​2
​​ . What is her speed 3.66 s later?

Select the correct answer
8.24
m/s
17.8
m/s
9.50
m/s
11.5
m/s
14.9
m/s
No answer submitted
0 of 2 checks used

Question 40
(1 points)

(#282754) {Interpreting Graphs}



Which of the following is NOT an accurate statement about interpreting graphs of an object's motions?

(For the sake of brevity, we will refer to the net area bounded by the curve and the zero on the time axis in the period between two time points as simply the "area under the curve")

Select the correct answer
The area under the curve of a position-versus-time plot gives the average velocity of the object during that period.
The area under the curve of a velocity-versus-time plot gives the displacement of the object during that period.
The slope of a velocity-versus-time-plot gives the instantaneous acceleration of the object at that time.
The area under the curve of an acceleration-versus-time plot gives the net change in velocity during that period.
The slope of a position-versus-time plot gives the instantaneous velocity of the object at that time.
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Question 41
(1 points)

(#912311) {{Position, Velocity, Acceleration} / {Velocity-Acceleration Relationship}



The velocity of a motorized toy moving along a straight runway is given by the following formula :



�
(
�
)
=
(
1
.
1
0

c
m
/
s
3
)
⋅
�
2
+
(
7
.
4
0

c
m
/
s
2
)
⋅
�
+
(
2
1
.
3

c
m
/
s
)
v(t)=(1.10 cm/s
​3
​​ )⋅t
​2
​​ +(7.40 cm/s
​2
​​ )⋅t+(21.3 cm/s)



Calculate the acceleration of this toy car at the instant t = 7.00 seconds



Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8

Enter answer here
cm/s
2
​2
​​
No answer submitted
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Question 42
(1 points)

(#827123) {{Position, Velocity, Acceleration} / {Velocity-Acceleration Relationship}



The position of an rocket moving along a straight line is given by the following formula :



�
(
�
)
=
(
5
.
3
0

m
/
s
4
)
⋅
�
4
+
(
4
.
1
0

m
/
s
2
)
⋅
�
2
+
(
3
.
2
0

m
)
x(t)=(5.30 m/s
​4
​​ )⋅t
​4
​​ +(4.10 m/s
​2
​​ )⋅t
​2
​​ +(3.20 m)



Calculate the velocity of this object at the instant t = 4.00 seconds



Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8

Enter answer here
m/s
No answer submitted
0 of 5 checks used
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