A 60kg sprinter starts from rest and reaches a speed of 8.5m/s in 1.8s. During this time there is...

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A 60kg sprinter starts from rest and reaches a speed of 8.5m/s in 1.8s. During this time there is negligible air resistance. The sprinter then runs the remainder of the race at a constant 8.5m/s with a resistance force of 52N due to wind.a) How much power must the runner produce during the acceleration phase?b) How much power must the runner produce during the constant phase?

Robert · Accepted Answer

A sprinter with a mass of 60kgM  starts from rest and reaches a speed of 8.5m / sfv   in 
1 1.8s.T   During this time, there is negligible air resistance. The sprinter then runs the remainder 
of the race at a constant speed of fv  with a resistance of 2 52 NF   due to wind.
a) How much power 1P  must the runner produce during the acceleration phase?
We have
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A 60kg sprinter starts from rest and reaches a speed of 8.5m/s in 1.8s. During this time there is negligible air resistance. The sprinter then runs the remainder of the race at a constant 8.5m/s with...

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