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Forces are measured in units called NEWTONS
Force can be measured with a Spring Scale
The combination of all of the forces acting on an object determines the effect of the force.
comparing a force to a tug a war with a rope. Some people pull the rope one way, and others pull the opposite way. If the forces pulling one way are stronger than the forces pulling in the opposite direction, the rope moves in the direction of the stronger force. THE FORCES ARE UNBALANCED!!!!
To find the overall effect of forces acting on an object, you add the forces together. The resulting force is called the NET FORCE. The net force is 2 N force pulling to the right. the net force determines the change in an objects motion. A stronger force could stop a moving object. Friction: Friction is the force that resists the movement of one surface past another. Friction is a force opposite of the direction of the balls motion.
TYPE OF FRICTIONS
ROLLING: RESISTS THE MOTION of a rolling object
SLIDING:RESISTS THE MOTION OF A SLIDING OBJECT
STATIC: RESISTS THE MOTION OF AN OBJECT JUST AS IT BEGINS TO MOVE
FIRST LAW OF MOTION
An object at rest remains at rest.
SECOND LAW OF MOTION
The acceleration of an object depends on the mass of the object and the size of the net force applied.
THIRD LAW OF MOTION
When a force is applied to an object, the object exerts an equals force in the opposite direction
Not all forces cause a change in motion
The direction of an objects acceleration depends on the direction of the forces on the object.
For every action, there is an equal and opposite reaction.
Friction between wind and soil can cause erosion
GF: IS THE FORCE OF ATTRATION BETWEEN ANY OBJECT AND EVERY OTHER OBJECT IN THE UNIVERSE.
An objects mass the amount of matter that makes up the object.
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