An object following a straight-line path at constant speed
A) has zero acceleration.
B) has no forces acting on it
C) has a net force acting upon it in the direction of motion.
D) none of these

Question

Quizplus · Accepted Answer

An object moving in a straight line at constant speed has zero acceleration because its velocity is not changing. Acceleration is defined as the rate of change of velocity with time, so if the velocity (both speed and direction) remains constant, the acceleration is zero.

An Object Following a Straight-Line Path at Constant Speed