A train travels around a curve of increasing radius at a constant speed. The magnitude of the train's centripetal acceleration
A) decreases.
B) remains constant.
C) increases.
D) is zero.
E) is unknown; more information is needed to work out the answer.

Question

Quizplus · Accepted Answer

The magnitude of the train's centripetal acceleration decreases as the radius of the curve increases, given that the speed remains constant. This is because centripetal acceleration is inversely proportional to the radius of the curve (a_c = v^2/r).

A Train Travels Around a Curve of Increasing Radius at a Constant