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Posted by **aok** on Wednesday, December 15, 2010 at 2:24pm.

What is the amount of work done on Derek's car by the gravel strip?

If the gravel strip is completely flat, what is the coefficient of kinetic friction between the gravel and Derek's car's tires?

- physics -
**bob pursley**, Wednesday, December 15, 2010 at 3:14pmWell,

vf^2=Vi^2+2ad and from that solve for acceleration, a.

but a= forcefriction/mass= mu*g

if a= mu*g, you can solve for mu.

work done: mu*mg*distance

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