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5/37 MCQs for:

MECHANICS : FORCES - Newton’s laws of Motion

What is the net force required to accelerate a 1000 kg car at 2 m/s²?

1500 N.

1000 N.

2000 N.

500 N.

Which of the following is a correct interpretation of Newton’s Third Law?

The force on an object is proportional to its velocity.

Objects move in a straight line unless acted upon by an external force.

A force exerted on an object causes it to accelerate.

For every action, there is an equal and opposite reaction.

The figure shows an arrangement which is used to investigate collisions between two trolleys. Trolley B is initially stationary and the end of Y of the tape is closer to trolley A.

A ticker tape produced from this experiment will likely be:

In the figure, a shop keeper pulls a bag of rice of mass 50 kg along a rough horizontal floor, against a frictional force of 20N.

He applies a force of 100N on an inextensible string, inclined at an angle of 60° to the horizontal.

The acceleration of the bag is:

2 ms⁻².

0.3 ms⁻².

0.6 ms⁻².

6 ms⁻².

Which of the following is an example of applying Newton's Third Law in a spacecraft?

A spacecraft traveling at constant speed in space.

A spacecraft moving in the opposite direction of the force applied.

A spacecraft accelerating due to expelled fuel.

A spacecraft gaining momentum in orbit.