Third law of motion MCQs
1. Walking is possible on the account of
a) Newton’s First Law of Motion
b) Newton’s Second Law of Motion
c) Newton’s Third Law of Motion
d) Newton’s Law of Gravitation
Answer: (c)Newton’s Third Law of Motion
2. When we jump out of the boat standing in still water, the boat moves
a) Forward
b) Backwards
c) Sideways
d) It doesn’t move
Answer: (b) Backwards
3. A man is at rest on perfectly smooth ice in the middle of a pond. Using the principle of which law will get him to the shore?
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) All the above three laws
Answer: (c) Newton’s Third Law
4. Recoiling of a cannon after firing a shot is an example of
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Newton’s Law of Gravitation
Answer: (c) Newton’s Third Law
5. A body floats in a beaker that contains liquid. If the whole system as shown in the figure falls freely under gravity, then the upthrust on the body due to the liquid is
a) Equal to the weight of the displaced liquid
b) Equal to the weight of the body in the air
c) Zero
d) None of the above
Answer: (c) Zero
6. The gun recoils after firing a bullet due to
a) Newton’sThird Law of Motion
b) The backward thrust of gases
c) Newton’s First Law of Motion
d) Conservation of Energy
Answer: (a) Newton’s Third Law of Motion
7. In the above question, how high does the lift take the passenger?
a) 36 meters
b) 3.6 meters
c) 44 meters
d) 4.4 meters
Answer: (a) 36 meters
8. Why won’t the man attempting to pull himself by tugging on his hair not succeed?
a) The frictional force in play while gripping is small.
b) The exerted force is small.
c) The force applied is internal to the system.
d) Newton’s law of inertia is not applicable to living beings.
Answer: (c) The force applied is internal to the system.
9. The horse pulling the wagon is able to move forward because of
a) the force exerted by the horse on the ground
b) the force exerted by the ground on the horse
c) the force exerted by the wagon on the horse
d) the force exerted by the horse on the wagon
Answer: (b) the force exerted by the ground on the horse
