Newton’s Laws of Motion and Applications - One Line Questions

1. What is the impulse experienced by an object if a force of 50 N acts on it for 0.1 seconds? — 5 Ns
2. If a 10 kg object has a momentum of 50 kg m/s, what is its velocity? — 5 m/s
3. If a force of 20 N is applied to a 4 kg object, what is its acceleration? — 5 m/s²
4. What is the momentum of a 5 kg object moving at a velocity of 10 m/s? — 50 kg m/s
5. What is the magnitude of the force exerted by the Earth on a 1 kg object at its surface (approximately)? — 10 N
6. If you push a box with a force of 10 N and it moves with an acceleration of 2 m/s², what is the mass of the box? — 5 kg
7. What is the force required to accelerate a 100 kg object at 5 m/s²? — 500 N
8. If the mass of an object is 10 kg and its velocity changes from 5 m/s to 15 m/s in 2 seconds, what is the average force acting on it? — 50 N
9. Which of the following situations best illustrates the effect of unbalanced forces? — A ball being kicked and changing its direction and speed.
10. Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction. Which of the following is an example of this law? — A rocket expelling gas downwards to move upwards
11. Which of the following scenarios best demonstrates the concept of inertia? — A heavy object is harder to push than a light object.
12. If the mass of an object is doubled while the applied force remains constant, what happens to its acceleration according to Newton's Second Law? — Acceleration is halved.
13. If two forces of equal magnitude but opposite directions act on an object, what is the net force? — Zero
14. What is the mathematical formula that represents Newton's Second Law of Motion? — F = ma
15. Which of Newton's Laws of Motion describes the relationship between force, mass, and acceleration? — Second Law
16. A sprinter accelerates from rest. Which of Newton's laws is primarily demonstrated when the sprinter pushes backward on the track to move forward? —
17. What is the product of mass and velocity called? — Momentum
18. What is the SI unit of mass? — Kilogram
19. If the net force on an object is doubled, its acceleration is: — Doubled
20. If the net force acting on an object is zero, what can be said about its acceleration? — It is not accelerating.
21. What is the change in momentum of an object when a constant force acts on it for a specific time interval? — It is equal to the product of force and time (Impulse).
22. According to Newton's Second Law, if the mass of an object is kept constant, its acceleration is directly proportional to the applied force. What happens to acceleration if the force is doubled? — It is doubled.
23. What is the unit of force in the SI system? — Newton
24. What is the unit of momentum? — kg m/s
25. What quantity is conserved in collisions when no external forces are present? — Momentum
26. According to Newton's First Law of Motion, an object in motion will continue in motion with constant velocity unless acted upon by an external force. What is another name for this law? — Law of Inertia
27. What is the SI unit of acceleration? — m/s²
28. A balanced force is applied to an object. What is the resulting acceleration? — Zero acceleration
29. An object's tendency to resist changes in its state of motion is called: — Inertia
30. What happens to the momentum of a system if no external forces act on it? — Momentum remains constant (conserved).
31. A person is standing on a skateboard and pushes off a wall. The wall exerts a force on the person and skateboard, causing them to move away from the wall. This is an example of: — Newton's Third Law
32. When you jump upwards, you push down on the Earth. The Earth pushes back up on you with an equal and opposite force, allowing you to jump. This is an application of: — Newton's Third Law
33. A cannon fires a ball. The cannon recoils backward as the ball moves forward. This is a demonstration of: — Newton's Third Law
34. When a bird flies, it pushes air downwards. The air, in turn, pushes the bird upwards. This is an example of: — Newton's Third Law
35. When a force is applied to an object, it causes a change in its state of motion. This change is described by: — Newton's Second Law
36. A boat moves forward in water. The boat pushes water backward. This is an application of: — Newton's Third Law
37. A rocket works on the principle of: — Newton's Third Law
38. When you walk, you push the ground backward. The ground pushes you forward, enabling you to move. This exemplifies: — Newton's Third Law
39. A hammer strikes a nail. The hammer exerts a force on the nail, and the nail exerts an equal and opposite force on the hammer. This is an example of: — Newton's Third Law
40. Which law explains why it is harder to push a heavy box than a light box across a floor? — Newton's First Law (Inertia)
41. When a bus suddenly stops, passengers tend to move forward. This is an illustration of: — Newton's First Law
42. A spacecraft in outer space, far from any gravitational sources, continues to move at a constant velocity even when its engines are off. This is due to: — Newton's First Law
43. A person sitting in a car experiences a forward jerk when the car starts moving. This is an example of: — Newton's First Law
44. Consider two objects, A and B, where mass of A is greater than mass of B. If the same force is applied to both, which object will experience greater acceleration? — Object B
45. If an object is moving with constant velocity, its acceleration is: — Zero
46. A car is moving at a constant speed in a straight line. What can be said about the net force acting on the car? — The net force is zero.
47. Two objects of equal mass are pushed with forces F1 and F2, respectively. If F1 > F2, which object will have a greater acceleration? — The object pushed with F1
48. An object at rest will remain at rest, and an object in motion will continue in motion with constant velocity, unless acted upon by a net external force. This statement is: — True, and it's Newton's First Law.
49. Inertia is the tendency of an object to resist changes in its state of motion. Which quantity is a measure of inertia? — Mass
50. What is the term for the rate of change of momentum of an object? — Force
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