Pakistan MCQs

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

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.

Slope gives change in velocity per unit time.
That is acceleration.

Integrating velocity over time gives displacement.
Areas below the time axis count as negative displacement.

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.

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