Question

How much work is done by the centripetal force (in this case, the friction between the tires and the road) on a 1200 kg car moving on a circular track of radius 50 meters at a constant speed of 31.4 m/s?

A. 7.4 • 10^6 J
B. 19.7 J <---
C. 2136.7 J
D. 117,600 J
E. 0 J

Answer 1

There is no motion in the direction of the force. NO WORK DONE!

Answer 2

Thank You!