Notes

1. A __________________ hull has a flat bottom shape and when traveling at high speeds can partially rise above the surface of the water.

Your Answer: planing

2. Label the diagram below with the proper nautical boat measurements.

Your Answer: A. Beam, B. Freeboard, C. Draft

3. HYDRODYNAMICS is the study of motion in fluids and the forces acting on objects traveling through them (example: boats)

Your Answer: true

4. A boat in open water experiences an upward force called the buoyant force. According to Archimedes Principle of Buoyancy, this buoyant force is equal to the weight of the fluid displaced by the object.

Your Answer: true

5. What happens to the water line on a boat when additional weight in the form of people and cargo is added on-board?

Your Answer: The waterline will move upward

6. A ______________ hull displaces water out of its path as it moves across open water. This hull type is known for being more stable when traveling through rough waves.

Your Answer: Displacement

7. The cargo ship pictured below is capsizing as a result of either two much cargo, choppy waves or uneven distribution of the cargo weight. It is very important to evenly distribute the weight of the cargo across the entire surface area of the boat to prevent disasters like the one pictured below.

Your Answer: true

8. Sandy's boat was raced in a testing tank and the timing system measured the amount of time the boat took to travel through a 1 meter distance. Once Sandy's boat reached the finish line, the results on the board were displayed in miles per hour. If Sandy's boat traveled across the tank at a speed of 4 miles per hour then how many feet per second would the speed be if she were to complete the conversion calculation?Round your answer to the nearest hundredth place value.1 mile = 5,280 feet;1 hour = 3,600 seconds

Your Answer: 6.88 6.87 feet per second

9. Jon's boat was raced in a testing tank and the timing system measured the amount of time the boat took to travel through a 1 meter distance. Once Jon's boat reached the finish line, the results on the board were displayed in miles per hour.If Jon's boat traveled across the tank at a speed of 8 miles per hour then how many kilometers per hour would the speed be if he were to complete the conversion calculation?Round your answer to the nearest hundredth place value.1 kilometer = .62137 miles

Your Answer: 12.87 kilometers per hour

10. Air vs. Water. There is more resistance (force of water pressure) to overcome when traveling in water rather than traveling through the air.

Your Answer: true

11. While boat testing, the river tanks pulley and counterweights system were employed to provide the power necessary for pulling the boat across the tank without any on-board motors.

Your Answer: true

12. In order for any object to float on the surface of a liquid, we must make sure the object’s density is lower than the density of the liquid the object is expected to float on. We must also measure the amount of surface area the object takes up.

Your Answer: true

13. If an object is in _______________, all forces are balanced, and then if a force is applied to the object it will either yaw, pitch or roll.

Your Answer: equillibrium

14. The ______________ the center of gravity, the more stable the object. The ____________ it is the more likely the object is to roll over if it is pushed.

Your Answer: lower, higher

15. Decreasing the amount of surface area gives an object a better chance to displace enough water to offset its own weight.

Your Answer: false

16. If a large boat passes too close to you in a small boat, you could be caught in this _______________ effect and pulled into the side of the larger boat.

Your Answer: hydrodynamic

17. As a boat moves through water the friction of the water on the bow and on the hull causes the water to create turbulence.

Your Answer: true

18. Which type of boat has two hulls and is considered very stable due to its wide beam?

Your Answer: catamaran

19. The position of the center of gravity on an object affects its stability.

Your Answer: true

20. The center of gravity on each of the boats pictured below is located in the same position.

Your Answer: false