MDCAT 2026 MCQs

The action is happening at the moment of speaking.
The present continuous tense is therefore required.

Near Earth's surface, gravitational potential energy is mgh.
Only changes in potential energy are physically significant.

Power measures how quickly work is done.
Its SI unit is the watt.

The net work on an object changes its kinetic energy.
This relation is valid for the total work of all forces.

Conservative forces transfer energy between kinetic and potential forms.
Nonconservative work changes total mechanical energy.

For conservative forces, work around a closed path is zero.
Gravity and ideal spring force are examples.

Linear momentum is a vector quantity p=mv.
Its direction is the direction of velocity.

Impulse equals force integrated over time.
For constant force, J=FΔt=Δp.

Opposing forces subtract.
Net force = 50-20 = 30 N.

Internal forces cancel in pairs within a system.
With no net external impulse, total momentum remains constant.

Use a=F/m.
A=12/4 = 3 m/s².

All isolated collisions conserve momentum.
Elastic collisions also conserve total kinetic energy.