MDCAT Physics MCQs

Torque magnitude equals force times perpendicular lever arm.
A larger moment arm produces greater turning effect.

The net force is 80-20 = 60 N.
Acceleration is 60/15 = 4 m/s².

Angular velocity describes how fast and in which sense an object rotates.
Its SI unit is rad/s.

Constant velocity means zero acceleration and zero net force.
The normal force therefore equals the person's weight, 600 N.

Work transfers energy when a force acts through a displacement.
Only the component of force along displacement contributes.

Kinetic energy depends on mass and speed.
For translational motion, K=½mv².

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.

Acceleration is net force divided by mass.
A=30/6 = 5 m/s².

Weight is W=mg.
W=7×10 = 70 N.