# Multiple Choice Questions on Rotational Motion

Multiple Choice Questions on Rotational Motion for AP Physics are as follows:

01. The opposition of a body to change it’s state of rest or uniform motion about an axis is _________

02. When a ballet dancer folds her arms, angular velocity _______________

03. What is the reason, when a diver is in air, he bends legs are near his head?

04. Rigid Body is a body for which the distance between any two points is _______________

05. Moment of Inertia of Solid Cylinder about a perpendicular axis passing through its center is _______

06. To produce rotational motion in a body, ________ is applied to overcome its inertia

07. Moment of Inertia of a Uniform Solid Sphere about a diameter is ___________

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08. The imaginary line passing through the body about which the different particles of the body will revolve in different circles, is called the _____________ of the rigid body.

09. What physical quantity does this term (ωt + 0.5αt²) refer to?

10. Name the following: A system two equal and opposite forces, separated by a distance, having no resultant force. It is pure moment of force and causes rotation without translation

11. The ____________ of a body about given axis of rotation is defined as the distance of axis of rotation and the point at which the whole mass of the body can be supposed to be concentrated so as to have the same Moment of Inertia as that of the body about that axis.

12. Moment of Inertia for Thin, Uniform Rod about an axis passing through the center of mass of rod and perpendicular to its length is ________

13. ___________ about about a point is defined as the product of force and the perpendicular distance of the point of application of force from the point.

14. Moment of Inertia for Thin, Uniform Rod about an axis passing through the end of rod and perpendicular to its length

15. Moment of Inertia of thin ring about About diameter is _____

16. A motion is said to be __________ motion if a body posses both linear motion (translational motion) and rotational motion.

17. Moment of Inertia of thin ring about a tangent perpendicular to its plane is _____

18. Name the Principle: The moment of inertia of a plane lamina about an axis perpendicular to its plane is equal to the sum of MI about two mutually perpendicular axes in the plane of lamina and intersecting at the point where the perpendicular axis cuts the lamina.

19. True or False: Moment of Inertia is the property of a body in rectilinear motion.

20. Moment of Inertia of thin ring about a perpendicular axis passing through its centre is _____

21. Name the Principle: If no resultant external torque acts on a rotating body, then its angular momentum is conserved.

22. Moment of Inertia of thin Disc About diameter

23. Moment of Inertia It depends on axis of rotation and __________ of body around axis of rotation

24. True or False: In Rotational Motion, Linear momentum is conserved, if no external torque acts on the body

25. True or False: In Rotational Motion, All particles of a body have different linear speed

26. What physical quantity does this term (0.5 Iω²) refer to?

27. Moment of Inertia of Solid Cylinder about its axis is _________

28. Moment of Inertia of thin ring about a tangent in its plane is _____

29. The total Kinetic Energy of a Rolling solid sphere is ______

30. What physical quantity does this term (τω) refer to?

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## Answers to Multiple Choice Questions on Rotational Motion

01. Moment of Inertia
02. increases
03. Bending the legs lowers the moment of inertia, so angular velocity increases. So the diver can take many somersaults before hitting water.
04. constant
05. (1/4) MR² + (1/12) ML²
06. Torque
07. 0.4 MR²
08. axis of rotation
09. Angular Displacement (θ)
10. Couple
12. ML²/12
13. Torque or moment of force
14. ML²/3
15. MR²/2
16. rolling
17. 2 MR²
18. Principle of Perpendicular Axes
19. False {rotational motion}
20. MR²
21. Principle of Conservation of Angular Momentum:
22. 0.25 MR²
23. distribution of mass
24. False {Angular momentum is conserved}
25. True
26. Kinetic Energy of a rotational Motion
27. (1/2) MR²
28. 1.5 MR²
29. 0.7 Mv²
30. Power in Rotational Motion