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December 28, 2014

December 28, 2014

Posted by **Physicster** on Saturday, March 13, 2010 at 9:43pm.

How much work must be done by the brakes to bring the bike and rider to a stop?

How far does the bicycle travel if it takes 4.5 s to come to rest?

What is the magnitude of the braking force?

I know the work in the first question is -6.43366 kJ but I have no idea how to find the distance and force.

- Physics -
**bobpursley**, Saturday, March 13, 2010 at 9:46pmaverage velocity= 13.5m/s * 1/2

distance= avgvelocity*time

force*distance= initial KE

solve for force.

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