Asked by Juan

Peggy is runnig around the school track at a constant speed. The track has two straight stretches on the sides and two curved stretches at either end. Where on the track does Peggy experience balanced and unbalanced forces? Explain your answer.
Answered by drwls
At constant velocity on a straight section, she experiences no net force.

On the curves, she experiences centripetal acceleration. This requires an unbalanced force