Motion in a Plane Mock Test – Class 11 Physics

1. A claim says that the centripetal acceleration of a body in uniform circular motion is directed outward because the body tends to fly away. The correct repair is:

2. A learner states that the centripetal acceleration of a particle in uniform circular motion is constant because and are constant. The most accurate response is:

3. A vector formula list contains the following claims:
I.
II.
III.
For uniform circular motion, the supported claims are:

4. Assertion: The components of a vector depend on the chosen coordinate axes.
Reason: Components are projections of the vector on the selected axes.

5. A ball is projected horizontally at from a height of . Taking , the horizontal distance covered before hitting the ground is:

6. Two equal vectors of magnitude make an angle of with each other. Their resultant magnitude is:

7. Study the table for two vectors of fixed magnitudes and .

The row that needs correction is:

8. A projectile has and . Taking , the value of , where is the angle made by the velocity with the horizontal after , is:

9. Assertion: For two non-zero vectors of fixed magnitudes, the resultant is maximum when the angle between them is .
Reason: In the formula , the term has its maximum value at .

10. A river is wide and flows east at . A boat has speed relative to water and must land exactly opposite its starting point. The crossing time is:

11. Three vectors are , , and . Their resultant is:

12. If a vector is denoted by , then represents:

13. A wheel of radius rotates uniformly at . The centripetal acceleration of a point on its rim is:

14. A particle has position vector , where is in and is in . The distance of the particle from the origin when its speed is minimum is:

15. In the small-interval reasoning for uniform circular motion, the change in velocity becomes directed toward the centre in the limiting case because:

16. A particle starts from the origin. At , its position is , and its velocity is . If acceleration is constant, the initial velocity and acceleration are:

17. A path is curved on a sheet of graph paper, and the position of a small bead is marked at different times. A two-dimensional description is needed mainly because:

18. For the projectile in the previous situation, with and time of flight , the horizontal distance from the foot of the cliff is:

19. For two vectors at angle , the direction of the resultant relative to is often written as:

20. A body first undergoes displacement in , then displacement in . Its average speed and magnitude of average velocity for the whole motion are respectively:

21. The components of a displacement vector are and . The magnitude of the displacement is:

22. Two projectiles are launched from the same point with the same initial speed and complementary angles and . When both land at the same level, their ranges are:

23. Two projectiles are launched on level ground with the same speed. One is fired at and the other at . The ratio of their maximum heights is:

24. A displacement record is shown below.

The row that describes the resultant incorrectly is:

25. Study the compact case table for two vectors of magnitudes and .

The row that does not match the vector addition formula is:

26. In non-uniform circular motion, the total acceleration is not generally directed toward the centre because:

27. For a non-zero displacement during a positive time interval , the direction of is:

28. The triangle law and parallelogram law give the same resultant for two vectors because:

29. A projectile is launched with speed at above the horizontal. Its initial velocity components are:

30. A projectile is launched from level ground with speed . The angle that gives maximum range is , but the angle that gives maximum height for the same speed is:

31. A moving object is recorded at the same instant as and . The phrase “same instant” is important because:

32. Two equal non-zero vectors have a resultant whose magnitude is equal to the magnitude of either vector. The angle between the two vectors is:

33. For two vectors and , the components of are:

34. A displacement is drawn as an arrow on paper. In this representation, the length of the arrow is used to show:

35. A displacement vector represents west. A new vector is defined as . The vector represents:

36. A component record is made for a vector whose angle is measured from the positive -axis.

The row that contains a sign error is:

37. Two cars move along the same straight road. Car has velocity , and car has velocity . The velocity of with respect to is:

38. Study the table for projectiles launched with the same speed on level ground.

The row that needs correction is:

39. Given , , and resultant magnitude , the value of , where is the angle between the two vectors, is:

40. A velocity changes from to in . The average acceleration is:

41. A vector has magnitude , and its -component is . If the vector lies in the fourth quadrant, its -component is:

42. The position vector of a body is . At what time is its velocity perpendicular to the -axis?

43. A projectile is launched from ground level with initial vertical component . Taking , its total time of flight back to the same level is:

44. A graph description is given below.

The magnitude of the resultant is:

45. A vector of magnitude makes an angle with the positive -axis in the first quadrant. Its components are:

46. The table below lists some physical quantities.

The row that does not fit the usual scalar-vector classification is:

47. A vector of magnitude is resolved into perpendicular components and . A claim says that must always hold. The claim is:

48. Rain falls vertically downward at . A person running east observes the rain to make an angle with the vertical. The speed of the person is:

49. The average velocity in a plane is defined as:

50. A vector diagram shows two unequal vectors drawn from a common tail, and the completed parallelogram is slanted. The diagonal from the common tail is closer in direction to the longer vector. This happens because: