Laws of Motion Mock Test – Class 11 Physics

1. A passage describes a connected system.

The acceleration of the system is

2. A particle is acted on by forces east, north, and an unknown force. For equilibrium, the unknown force must have magnitude

3. A frame moving along a straight line has velocity for without changing speed or direction. Relative to an inertial frame, it is best described as

4. On a frictionless banked road, a vehicle can take a turn at the design speed without relying on friction because

5. A block is pushed horizontally with on a rough floor. The coefficients are and , with . What happens initially?

6. In a bicycle moving along a road, applying brakes mainly causes a change in motion because

7. In a one-dimensional collision, taking right as positive mainly helps to

8. The angle of repose is the angle of an inclined plane at which a body

9. A diagram is described in words: a block has arrows , , and acting on it. Arrow is right, arrow is left, and arrow is left. The block’s horizontal net force is

10. A car moves around a level circular road. The force that can provide the required centripetal force without slipping is mainly

11. A table gives four circular-motion statements.

The row containing an unsuitable statement is

12. A weighing scale under a person reads the normal reaction . A person stands in a lift accelerating upward at . Taking , the scale reading is

13. A student says, “In circular motion, the outward force balances the inward centripetal force, so the body moves in a circle.” The better explanation in an inertial frame is that

14. A magnet attracts an iron pin without touching it. This situation shows that a force can arise from

15. 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

16. For a conical pendulum with string tension making angle with the vertical, the suitable equations are

17. A learner writes, “An object with greater mass always has greater speed because it has greater inertia.” The physics error in this statement is that

18. For a block just about to slide down a rough inclined plane of angle , the coefficient of static friction is related to the angle by

19. A body has mass . The slope of its graph, where is vertical and is horizontal, is

20. The dimension of impulse is

21. In a two-body connected system, the acceleration is found by first adding equations for the two bodies. The main advantage of this method is that

22. A lamp hangs at rest from a vertical string. Taking , the tension in the string is

23. A rotating platform has angular speed . Two identical blocks are placed at radii and , and neither slips. The static friction required for the outer block is

24. Use the arrangement described below: a box is pulled by toward east and toward north at the same time. What can be said about the resultant force?

25. A mass hangs from a string and accelerates downward at . Taking , the tension in the string is

26. The table lists proposed equations for an Atwood machine with , where moves down and moves up.

The suitable row is

27. A graph description is given below.

The maximum value on this graph represents

28. A particle is pulled by east and north. A third force keeps the particle in equilibrium. The third force must have magnitude and direction

29. A conical pendulum consists of a bob moving in a horizontal circle while the string makes angle with the vertical. The horizontal component of tension provides

30. Use the arrangement described below: a block is pulled by a force of making an angle above the horizontal. The horizontal component of the force is . If the surface is smooth and vertical acceleration is zero, the horizontal acceleration is

31. A sign convention takes east as positive and north as positive. For a body, and . The acceleration components are

32. 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

33. A moving object is stopped with the same momentum change in two cases.

The average stopping force in Case P compared with Case Q is

34. A block is on a rough incline with . It is connected to a hanging mass . Taking , , and , the minimum hanging mass needed to just pull the block up the plane is closest to

35. Two blocks of masses and are connected by a light string on a smooth horizontal surface. A horizontal force of pulls the block. The common acceleration of the system is

36. Rolling friction is usually smaller than sliding friction mainly because

37. Assertion: A heavier body has greater inertia than a lighter body.
Reason: Inertia is measured by mass.

38. In an accelerating frame, an apparent force may be introduced only to

39. The steps below are used to derive the constant-mass form of Newton’s second law.
I. Start with .
II. Use .
III. For constant , write .
IV. Use .
The final result is

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

The fully suitable rows are

41. Study the table and identify the row that correctly describes a friction type.

42. The impulse-momentum theorem states that impulse equals

43. Passengers in a bus tend to fall backward when the bus suddenly starts moving forward. This observation is mainly an example of inertia of

44. In the three-block system , , on a smooth surface, a force pushes the block first. The contact force between the and blocks is

45. The table gives four cases for a smooth inclined block of mass connected to a hanging mass .

The unsuitable row is

46. A block is acted upon by forces east, west, and east along the same horizontal line. The net force on the block is

47. A data table for a body is shown.

The mass of the body is

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

49. A graph description is given below.

The slope of this graph represents

50. A force-acceleration graph for a body is a straight line, but it does not pass through the origin. One likely reason is that