Pakistan MCQs

Acceleration is change in velocity divided by time.
(5-20)/3 = -5 m/s².

Use s=ut+½at² with u=0.
S=½×2×25 = 25 m.

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

A surface exerts a normal force on an object in contact with it.
Its magnitude is not always equal to weight.

Friction acts tangentially at a contact surface.
It may be static or kinetic.

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

Displacement is a vector from initial to final position.
It can be zero even when distance traveled is not zero.

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

Distance is a scalar and depends on the actual path.
It is always nonnegative.

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

Average speed uses total path length.
It does not depend on direction.

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