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1. Newton’s First Law of Motion is also known as:
A. Law of Acceleration
B. Law of Momentum
C. Law of Inertia
D. Law of Force
2. According to the First Law, an object remains in its state of rest or uniform motion unless:
A. A balanced force acts on it
B. No force acts on it
C. An unbalanced force acts on it
D. Gravity acts on it
3. The tendency of undisturbed objects to stay at rest or in motion is called:
A. Velocity
B. Inertia
C. Friction
D. Acceleration
4. Galileo concluded from his inclined plane experiment that objects move with constant speed when:
A. A force acts continuously
B. No net force acts on them
C. Friction increases
D. Gravity pulls them strongly
5. What happens to a marble on a smooth horizontal plane in Galileo’s experiment?
A. It stops immediately
B. It continues to move forever
C. It moves in a circle
D. It falls to the ground
6. Which factor prevents perfect demonstration of the First Law in real life?
A. Air pressure
B. Frictional force
C. Magnetic force
D. Temperature
7. When a moving car suddenly stops, passengers tend to move forward due to:
A. Friction
B. Gravity
C. Inertia of motion
D. Air resistance
8. When a stationary bus suddenly starts, passengers fall backward because:
A. Air pushes them back
B. Bus floor moves but body resists motion
C. Gravitational pull acts
D. Inertia of rest vanishes
9. What safety device prevents injury when a car suddenly stops?
A. Airbag
B. Seat belt
C. Headlight
D. Brake pedal
10. When a motorcar makes a sharp turn at high speed, passengers tend to:
A. Fall to the center of the turn
B. Get thrown to one side
C. Move faster
D. Stop instantly
11. What is illustrated when leaves fall off a tree after shaking its branch?
A. Force of gravity
B. Inertia of rest
C. Air friction
D. Law of acceleration
12. The First Law of Motion applies to:
A. Only objects at rest
B. Only moving objects
C. Both at rest and moving objects
D. Only rotating objects
15. Which property determines how much inertia an object has?
A. Shape
B. Color
C. Mass
D. Volume
16. Which object has greater inertia?
A. A rubber ball
B. A stone of the same size
C. Both equally
D. None
17. When a tray of water is rotated quickly, water spills out because of:
A. Inertia of rest of water
B. Centripetal force
C. Inertia of motion
D. Gravitational pull
18. Which situation best demonstrates inertia of motion?
A. A book on a table
B. A stone lying on ground
C. A passenger moving forward when a bus stops
D. A ball staying at rest
19. Which situation best demonstrates inertia of rest?
A. Coin falling into glass after card is flicked
B. Ball rolling on floor
C. Car turning sharply
D. Fielder catching a ball
20. What does Newton’s First Law of Motion help to explain?
A. Why objects move without force
B. Why motion continues unless stopped by an external force
C. Why speed increases automatically
D. Why all forces are equal
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