Answered: #2. A car on a level road turns a…

#2. A car on a level road turns a quarter circle counter-clockwise. Static friction force causes the centripetal acceleration. Work done by static friction is A) positive B) negative C) zero

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter5: Energy

Section: Chapter Questions

Problem 12CQ: In most situations we have encountered in this chapter, frictional forces tend to reduce the kinetic...

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Question

#2. A car on a level road turns a quarter circle counter-clockwise. Static friction force
causes the centripetal acceleration. Work done by static friction is
A) positive
B) negative
C) zero

Expert Solution

Step 1

The expression for the work done by the static friction is,

$W = f s \cos θ$

Here, $θ$ is the angle between the frictional force f and the displacement s.

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