Question

For a body to be in dynamic equilibrium, its ______.

Options

• momentum should be zero.

• acceleration should be zero.

• kinetic energy should be zero.

• velocity should be zero.

Answer 1

For a body to be in dynamic equilibrium, its acceleration should be zero.

Explanation:

A body is in dynamic equilibrium when it moves at a constant velocity, showing it moves in a straight line with a constant speed. Newton’s First Law states that this condition arises when the net external force acting on an object is zero. Acceleration, defined as the rate of change of velocity `(a = (dv)/dt)`, indicates that a constant velocity implies a zero acceleration.