Posted by **Ed** on Friday, November 19, 2010 at 11:32pm.

What minimum coefficient of friction between the tires and the road will allow a 3700 kg truck to navigate an unbanked curve of radius 25 m at a speed of 45 km/h?

My answer:

Fnet=ma

Ff=m(v2)/r)

Ff=(3700)(452/25)

Ff=(3700)(2025/25)

Ff=(3700)(81)

Ff=299700

Frictional force

Ff=Fnµ

299700=(3700)(9.8)µ

299700=36260µ

µ= 8.3

Is this right? Thanks for your help.

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