NET Physics MCQs

At terminal velocity, net force is zero.
The object then moves with constant velocity.

Centripetal acceleration changes the direction of velocity.
It always points radially inward.

Centripetal force is not a separate force type.
It may be supplied by tension, friction, gravity, or another force.

A particle in translational equilibrium has no acceleration.
It may be at rest or moving at constant velocity.

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

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.