GAT Subject Physics MCQs

Newton's second law gives F=ma.
F=5×4 = 20 N.

In ideal free fall, air resistance is neglected.
All objects then have the same gravitational acceleration locally.

Acceleration is net force divided by mass.
A=30/6 = 5 m/s².

Average speed equals distance divided by time.
120/10 = 12 m/s.

Displacement is 14-2 = 12 m.
Average velocity is 12/4 = 3 m/s.

Average speed uses total distance.
400/80 = 5 m/s.

Uniform acceleration means velocity changes by equal amounts in equal times.
The standard kinematic equations apply.

Inertia is related to mass.
Greater mass means greater resistance to acceleration.

The first law describes inertia.
A net external force is required to change velocity.

For constant mass, Newton's second law becomes F=ma.
It links net force to acceleration.

Interaction forces occur in pairs on different bodies.
They are equal in magnitude and opposite in direction.

Weight depends on gravitational field strength.
Mass remains constant while weight may change with location.