If the acceleration of an object is always directed perpendicular to its velocity, then
A) the object is speeding up.
B) the object is slowing down.
C) the object is moving with a constant velocity.
D) the object is turning.
E) this situation would not be physically possible.

Question

Quizplus · Accepted Answer

If the acceleration is always perpendicular to the velocity, then the object is changing direction and therefore turning. The magnitude of the velocity may remain constant, but the direction is changing, which means the object is turning.

If the Acceleration of an Object Is Always Directed Perpendicular