An athlete runs on a circular track of radius R. What i... – Physics

Physicsmedium · Past Paper

An athlete runs on a circular track of radius R. What is his distance and displacement after 1.5 rounds?

A3*pi*R, 2R

B2*pi*R, R

Cpi*R, 2R

D3*pi*R, zero

✓ Correct Answer: A — 3*pi*R, 2R

Distance = 1.5 * circumference = 1.5 * 2*pi*R = 3*pi*R. After 1.5 rounds, he is at the opposite end of the diameter, so displacement = 2R.

Share this question