XI Physics Force and Motion Online Test Mdcat-2024

1. If the mass of an object is increased and force is kept constant, what will be the effect on acceleration?

2. Two bodies are moving towards each other from opposite directions with speed V. What is the magnitude of their relative velocity?

3. A force of 6.0 N changes the momentum of a moving object by 3.0 kg·m/s. How long did the force act on the mass?

4. In the head-on elastic collision of a heavy vehicle moving with a velocity of 20 m/s and a small stone at rest, the stone will fly away with a velocity equal to:

5. If momentum is increased by 20% then K.E. increases by:

6. Distance travelled by a body falling freely starting from rest in the 1st, 2nd, and 3rd seconds are in the ratio:

7. Throwing a package onto shore from a boat that was previously at rest causes the boat to move outward from shore. This is explained by:

8. If a body starts from a point and returns back to the same point then its:

9. An object with constant acceleration:

10. An object with a constant speed:

11. The total linear momentum of a system remains constant if:

12. All statements are correct about the third law of motion except:

13. Elastic collision is that collision during which:

14. When a body of mass (m) moving with velocity (V) collides elastically with another body of the same mass and at rest, then after the collision:

15. Which law is applicable in the motion of a rocket in space?

16. Stoke's law is applicable to:

17. A body moves over one-fourth of a circular arc in a circle of radius r. The magnitude of distance travelled and displacement will be respectively:

18. The external unbalanced force required to accelerate a body is proportional to the product of the mass of the body and the acceleration produced. This is called:

19. A car accelerates from its initial position and then returns to the initial point. Then:

20. A man walks on a straight road from his home to a market 2.5 km away with a speed of 5 km/h. Finding the market closed, he instantly turns and walks back home with a speed of 7.5 km/h. The average speed of the man over the interval of time 0 to 40 min is equal to:

21. A train has a speed of 60 km/h for the first hour and 40 km/h for the next half hour. Its average speed in km/h is:

22. The displacement of a particle, moving in a straight line, is given by S=2t² + 2t + 4  where s is in meters and t in seconds. The acceleration of the particle is:

23. The velocities of two equal masses A and B are 13 m/s and -14 m/s respectively. What will be their respective velocities after they suffer one-dimensional elastic collision?

24. A ball is in free fall. Its acceleration is:

25. A train is moving east at a speed of 5 m/s. A bullet fired westwards with a velocity of 10 m/s crosses the train in 8 s. The length of the train is:

26. A mass of 20 kg moving with a speed of 10 m/s collides with another stationary mass of 5 kg. As a result of the collision, the two masses stick together. The kinetic energy of the composite mass will be:

27. Two objects, P and Q, have the same momentum. Q has more kinetic energy than P if it:

28. When the velocity-time graph is a straight line parallel to the time axis then:

29. A body is falling freely under gravity. How much distance does it fall during an interval of time between the 1st and 2nd seconds of its motion? (taking g=10 m/s²)

30. An object is dropped from the top of a tower. If it takes 10 seconds to hit the ground, find the height of the tower: (g=10 m/s²)

31. A man covers the first half of his journey at the rate of 20 km/hr and the second half at the rate of 30 km/hr. If he takes a total time of 5 hours to complete the journey, how much total distance did he cover?

32. If the instantaneous speed and average speed of a body are not equal, then the body is moving with:

33. The initial velocity of a body decelerating at the rate of 2 m/s² is 20 m/s. What is the displacement covered by the body in the 4th second of its motion?

34. If momentum of a body changes from 100 Ns to 200 Ns in 10 s, then the unbalanced external force responsible for the change in momentum is:

35. Two masses of 1 g and 4 g are moving with equal kinetic energies. The ratio of their linear momenta is:

36. Of the following, which one is an impossible situation?

37. The speeds of two identical cars are (u) and (4u) at a specific instant. The ratio of respective distances in which the two cars are stopped from that instant is:

38. The area under the force-time graph is equivalent to:

39. The quantitative definition of force is given by:

40. The law of force that explains the concept of inertia is:

41. The numerical ratio of displacement to the distance covered by a body is always __ if the body moves in a straight line.

42. Acceleration is always __ for a free falling body:

43. The area between the velocity-time graph and the time axis is numerically equal to:

44. Displacement after half a circle with radius (r) is:

45. The diagram represents the straight-line motion of a car. Which of the following statements is true?

46. In which situation, distance is three times than its displacement?

47. If a car covers 2/5th of the total distance with speed V₁ and 3/5th of the distance with speed V₂, then the average speed is:

48. A person completes half of his journey with speed V₁ and the rest half with speed V₂. The average speed of the person is:

49.

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