1. Rotational Motion Review

2. Consider a point on a bicycle tire that is momentarily in contact with the ground as the bicycle rolls across the ground with constant speed. The direction for the centripetal acceleration for this point at that moment is:
upward.
down toward the ground.
forward.
at that moment the acceleration is zero.

3. A roller coaster has two loops of different radii
A roller coaster has two loops of different radii. Which will have the greater centripetal force?
loop with greater radius
loop with smaller radius
both have the same
not enough information

4. The Gemini roller coaster has two cars of differing mass
The Gemini roller coaster has two cars of differing mass. Which will have a greater centripetal force at the bottom of the first hill?
Car with more mass
Car with less mass
Both have the same
not enough information

5. A roller coaster has two loops of different radii
A roller coaster has two loops of different radii. What forces provide the centripetal force at the top of the loop?
Normal force
Gravitational force
Normal Force + Gravitational Force
Normal Force - Gravitational Force
Gravitational Force – Normal Force
Frictional Force

6. In a looped roller coaster, what force(s) provide the centripetal force at the top of the loop at the minimum speed needed to get over the loop?
Normal force only
Gravitational force only
Normal Force + Gravitational Force
Normal Force - Gravitational Force
Gravitational Force – Normal Force
Frictional Force

7. A roller coaster has two loops of different radii
A roller coaster has two loops of different radii. What forces provide the centripetal force at the bottom of the loop?
Normal force
Gravitational force
Normal Force + Gravitational Force
Normal Force - Gravitational Force
Gravitational Force – Normal Force
Frictional Force

8. A roller coaster has two loops of different radii
A roller coaster has two loops of different radii. What forces provide the centripetal force directly to the left of the loop?
Normal force
Gravitational force
Normal Force + Gravitational Force
Normal Force - Gravitational Force
Gravitational Force – Normal Force
Frictional Force

9. What gives the centripetal force that allows a motorcycle to drive around the inside of a cage?
Frictional
Gravitational
Normal
Tensional
Applied

10. What gives the centripetal force that keeps the moon revolving around the Earth?
Frictional
Gravitational
Normal
Tensional
Applied

11. Two adjacent lanes are curving
Two adjacent lanes are curving. If the lanes are flat, what provides the centripetal force?
Normal force
Gravitational force
Normal Force + Gravitational Force
Frictional Force

12. Two adjacent lanes are curving
Two adjacent lanes are curving. Which lane should you choose if you want to minimize the centripetal force?
inner lane
outer lane
both have same force
unable to be determined

13. A lane on the highway is curving and you feel forced towards the outside of the curve as you drive. The most direct cause of this is:
Normal force
Gravitational force
Inertia
Centrifugal force
Centripetal force

14. How is gravitational force proportional to the distance between two objects?
Directly
Inversely
No Correlation

15. How is gravitational force proportional to the mass of two objects?
Directly
Inversely
No Correlation

16. How is gravitational force proportional to the volume of two objects?
Directly
Inversely
No Correlation

17. On vacation, you go to the Grand Canyon and walk down to the bottom of the canyon. During this walk what happened to your weight?
Weight increased
Weight decreased
No change
Not enough information

18. You travel to another planet that has twice the radius of the Earth but the same mass. Compared to your weight on Earth, your weight will
Double
Be cut in half
Be ¼ your weight on Earth
The same

19. Which will produce the most torque?
5N force exerted .2m from the axis
10N force exerted .2m from the axis
20N force exerted .01m from the axis
5N force exerted .3m from the axis

20. What is a way to increase the torque on an object?
Exert more force.
Exert the same force at a greater distance from the fulcrum.
Exert a lesser force closer to the fulcrum.
Both 1 and 2 are correct
All of the above

21. Which of the following produces positive torque on a lever?
A parallel force 20cm from the axis
A perpendicular force upward 20cm to the right of the axis
A perpendicular force upward 20cm to the left of the axis
A perpendicular force downward 20cm to the right of the axis

22. The average position of an object’s weight is the
Fulcrum
Center of mass
Gravitational Force
Lever
Axis of rotation
Answer Now

23. An object in rotational equilibrium has
No torque applied
A constant tangential speed
A net torque of zero
An axis of rotation
Answer Now