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Class 9 Science Chapter 9 Force And Laws Of Motion Quiz 1 (60 MCQs)

Quiz Instructions

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1. Momentum is related to Newton's first law.
2. Which law says that for every action there is an equal and opposite reaction?
3. Two skaters begin at rest. Skater 1 has a smaller mass than Skater 2. After they push off each other, .....
4. The inertia of a moving object depends on:i. Mass of the objectii. Momentum of the objectiii. Speed of the object iv. Shape of the objectChoose the correct option:
5. If an unbalanced force acts on a stationary object, the object will:.
6. What is the product of an objects mass and velocity?
7. IF A & B ARE TWO OBJECTS WITH MASSES 60 Kg AND 34 Kg RESPECTIVELY, THEN
8. When a balloon held between the hands is pressed, its shape changes. This happens because:
9. In which of the following cases of motions, the distance moved and the magnitude of displacement are equal?.
10. Newton's first law of motion states that:
11. The speed of a car weighing 1500 Kg increases from 40 m/s to 50 m/s. Calculate the change in its momentum.
12. A bag lies on top of a table. Which statement correctly describes the situation?
13. A water tank filled upto 2/3 of its height is moving with a uniform speed. On sudden application of the brake, the water in the tank would
14. Oliver stepped onto a three-car subway train with standing room only. What caused him to fall backward into other riders when the train suddenly moved forward?
15. Which principle is followed in a take off of a rocket?
16. What is the correct equation of second law of motion?
17. Frictional Force acts in the
18. What is the Force that slows down and gradually stops motion?
19. The linear momentum of an object is 250 g cm/s. If the velocity of the object is 5 m/s, then the mass of the object is
20. A car is travelling at a speed of 90 km/h. Brakes are applied so as to produce a uniform acceleration of-0.5 m/s$^{2}$. Find how far the car will go before it is brought to rest?
21. The momentum of an object depends upon the object's ..... & .....
22. The SI units for force are .....
23. When a carpet is beaten with a stick, dust comes out of it is an example of
24. RATE OF CHANGE OF MOMENTUM IS EQUAL TO
25. When an object is at rest velocity and acceleration is zero
26. A cricketer catches a ball of mass 150g in 0.1 s moving with a speed of 20m/s, then he experiences a force of
27. When we talk about a force acting on a body, it usually means:
28. Pushing a door open is an example of
29. A cricket ball of mass 0.20 kg is moving with a velocity of 1.2m/s. Find the impulse on the ball and average force applied by the player if he is able to stop the ball in 0.10s?
30. A force of 20 N acting on a body of mass 10 kg is found to double its velocity in 8 s. Find its initial velocity
31. According to Newton's ..... Law of Motion, when a hammer strikes and exerts force on a nail, the nail exerts an equal force back on the hammer.
32. A rocket works on the principle of:
33. Defination of momentumn is the motion of a body is known as momentumn.
34. Which of the following statements is not correct for an object moving along a straight path in an accelerated motion?
35. If a man jumps out of a boat, the boat moves
36. The tendency of a body to resist its change of state is known as
37. The unit of measuring the momentum of a moving body is:
38. The inertia of an object tends to cause the object
39. The greater the mass of an object, the more force it will take to accelerate the object.
40. An unbalanced force acts on a body. The body
41. Is motion relative?
42. Slamming on the brakes in a moving car makes a passenger move forward against his or her seat belt because
43. What will be the momentum of a stone having mass of 10 kg when it is thrown with a velocity of 4 metre per second?
44. The speed of a car weighing 1500 kg increases from 36 km/h to 72 km/h uniformly. What will be the change in momentum of the car?
45. Complete the law:For every action, there is an ..... reaction.
46. Which object listed below has the greatest momentum?
47. When you push a boat off from the dock, you are demonstrating Newton's 3rd Law of Motion. It simply states that for every action there is an equal and opposite ..... ?
48. If a boy pushes a wall with a force of 10N towards east then the force exerted by the wall on the boy is .....
49. When a person jumps from a boat, the boat moves backward due to:
50. Objects tendency to resist change
51. The force with which an objects slides on a frictionless table will be
52. Inertia is the property of a body by virtue of which, it cannot change by itself
53. Newton's first law is also known as
54. What effect does friction have on a moving object?
55. Why do leaves fall from branches when it is shaken vigorously?
56. An external influence which changes or tends to change the state of rest or uniform motion of body is called
57. According to Newton's Second Law, if you increase the force applied to an object:
58. Which of the following statement is not correct for an object moving along a straight path in an accelerated motion?
59. The tendency of an object to resist a change in its state of motion is called:
60. Which type of force(s) will cause a change in an object's motion?
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