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5/37 MCQs for:

MECHANICS : FORCES - Newton’s laws of Motion

Which of these is an example of applying Newton's Second Law to calculate acceleration?

A rocket gains speed due to expelled gases.

A car moves at constant velocity.

A person feels pushed backward when a car accelerates.

A car accelerates at 2 m/s² when a force of 4000 N is applied to it.

Which of the following is a real-life example of Newton's First Law of Motion?

A car accelerating when the accelerator is pressed.

A person jerking forward when a car suddenly stops.

A rocket moving forward due to the expulsion of gas.

A person swimming forward by pushing against the water.

Which of the graphs in the figure best represents the variation of acceleration (Y) of a small ball dropped from the first floor of a storey building with time (X)?

What is the momentum of a 3 kg object moving at 4 m/s?

15 kg·m/s.

7 kg·m/s.

12 kg·m/s.

1 kg·m/s.

Which of the following is an example of Newton’s Third Law of Motion?

A person pushing a wall and the wall pushing back with equal force.

An object at rest staying at rest.

A car slowing down when brakes are applied.

A rocket accelerating forward due to expelling gas.