GAT Subject Physics MCQs

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

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

The runner returns to the starting point, so displacement is zero.
Average velocity is therefore zero.

Use v=u+at with u=0.
V=0+3×4 = 12 m/s.

Use v=u+at.
V=5+2×6 = 17 m/s.

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

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.

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.

Average velocity is a vector based on net displacement.
A round trip can have zero average velocity.

Slope gives change in displacement per unit time.
That is the definition of velocity.