When a body is moving in an inertial frame of reference, it has

Explanation

When a body is moving in an inertial frame of reference, it means that there are no external forces acting on the body. In such a scenario, according to Newton's first law of motion, the body will continue to move with a constant velocity (including zero velocity if it was initially at rest) unless acted upon by an external force. Acceleration is defined as the rate of change of velocity. If there are no external forces acting on the body, the velocity of the body will remain constant, and therefore, the rate of change of velocity (acceleration) will be zero. Therefore, the correct answer is A: zero acceleration, indicating that the body maintains a constant velocity in the absence of external forces. and with respect to an inertial frame, an object or body accelerates only when a physical force is applied, and (following Newton's first law of motion), in the absence of a net force, a body at rest will remain at rest and a body in motion will continue to move uniformly-that is, in a straight line and at constant ...