Laws of Motion Mock Test – Class 11 Physics

1. A mass moves in a vertical circle of radius . At the top, the string just becomes slack at speed . The relation at that instant is

2. Impulse is best described as the effect of a force acting over

3. A block on a smooth incline is connected over a smooth pulley to a hanging mass. Taking , the acceleration of the system is

4. Two blocks of masses and are in contact on a smooth horizontal surface. A force pushes toward . The contact force exerted on is

5. Read the situation below and answer the question.

What conclusion is best supported by this comparison?

6. Read the case below and answer the question.

Momentum conservation for the two-cart system is more reliable in

7. For the system in which a block on a smooth incline is connected to a hanging mass, the acceleration is . Taking , the string tension is

8. A three-force equilibrium arrangement is described below.

The conclusion from this arrangement is that the ring has

9. A book rests on a horizontal table. Earth pulls the book downward, and the table pushes the book upward. These two forces are mentioned here mainly to show that

10. Study the table and identify the row that contains an unsuitable statement about momentum.

11. An applied-force threshold record for a block on a rough floor is described below.

The limiting friction is

12. A body moving east at speeds up to east. The change in its momentum is

13. A free-body diagram of a hanging mass in an Atwood machine should show

14. A ball strikes a wall at east and rebounds at west. Taking east as positive, the impulse on the ball is

15. Mass is treated as a measure of inertia because it tells how strongly a body resists

16. A block is on a rough inclined plane of angle . It is just at rest and about to slide down. Taking , the limiting friction is

17. A cart moving on a rough floor gradually comes to rest after being pushed and released. The best explanation is that

18. A ball moving east at is stopped by a player. The impulse on the ball is

19. A moving ball turns through a right angle without changing speed. Its initial momentum is eastward with magnitude , and its final momentum is northward with magnitude . The magnitude of change in momentum is

20. A string can provide centripetal force to a stone in circular motion only while

21. A small ring is pulled by two horizontal strings. One string pulls to the right and the other pulls to the left. No other horizontal force acts. The horizontal acceleration of the ring is

22. For a fixed net force, an versus graph is drawn. Its slope represents

23. For a body of constant mass , the relation connecting change in momentum and change in velocity is

24. Two bodies interact only with each other in deep space. During the interaction, one body gains momentum . The momentum change of the other body is

25. The acceleration in uniform circular motion is directed

26. A body of mass moves in a circle with angular speed and radius . Using , the centripetal force can be written as

27. A statement says, “If a body is moving fast, the net force on it must be large.” The best correction is

28. A table compares two ways of applying the same oblique force to a block on a rough horizontal floor.

The fully suitable rows are

29. The table below lists common observations and types of inertia.

The row that contains an unsuitable explanation is

30. Newton’s second law in momentum form is especially useful because it directly connects net force with

31. Increasing the stopping time for the same change in momentum reduces the average force because

32. A rope pulls a crate with a tension force . The third-law partner of the force of the rope on the crate is

33. Read the case below and answer the question.

Which description about the frames is most suitable?

34. A signboard is at rest and is supported by a vertical string. Taking , the tension in the string is

35. The SI unit of linear momentum is

36. A constant force of acts east on a body for . The impulse delivered to the body is

37. A force acting on a constant-mass body is doubled, while the mass is also doubled. The acceleration becomes

38. A force diagram for a block on a rough incline shows perpendicular to the plane and along the plane. The diagram is unsuitable because

39. A block of mass lies on a rough horizontal table and is connected over a smooth pulley to a hanging mass . If the block slides and the coefficient of kinetic friction is , the system acceleration when moves downward is

40. Two masses and are connected over an ideal pulley, with . The acceleration magnitude of the system is

41. In the smooth inclined-plane and hanging-mass system, the expression gives a positive value. This means

42. A block is placed on a rough inclined plane and tends to slide down. The static friction on the block acts

43. Linear momentum of a body is defined by

44. Study the before-after record for a one-dimensional collision on a smooth horizontal track.

If external horizontal force is negligible, is

45. A spring balance is used to pull a block horizontally on a smooth table. If the block accelerates, the spring balance reading represents

46. A body moving east at and a body moving east at form a system. The system’s total momentum is

47. A body of mass moves with constant speed in a circle of radius . A proposed expression for the required inward force is . The main problem with this expression is that

48. A block is pressed against a vertical wall by a horizontal hand force. The wall’s normal reaction on the block is directed

49. A stationary truck has large mass but zero velocity. Its momentum is

50. In the rough-surface two-block system with masses and , a force pushes the block, , and the acceleration is . The contact force on the block is