A car travels around a curve of constant radius at a constant speed. The direction of the car's centripetal acceleration is
A) horizontal.
B) vertical.
C) tangent to the curve, and points in the same direction as the car is moving.
D) radially inward.
E) unknown; more information is needed to work out the answer.

Question

Quizplus · Accepted Answer

The direction of a car's centripetal acceleration when moving in a circle at constant speed is always radially inward towards the center of the circle, regardless of the curve's orientation or the car's speed.

A Car Travels Around a Curve of Constant Radius at a Constant