A car rounds a 20-m radius curve at 10 m/s. The magnitude of its acceleration is: A) 0 B) 0.20 m/s² C) 5.0 m/s² D) 40 m/s² E) 400 m/s²

Question

Quizplus · Accepted Answer

The formula for acceleration in circular motion is a = v^2/r, where v is the speed and r is the radius of curvature. Substituting the given values, we get a = (10 m/s)^2 / 20 m = 5 m/s^2. Therefore, the magnitude of the acceleration is 5.0 m/s^2, which corresponds to choice C.

A Car Rounds a 20-M Radius Curve at 10 M/s