A 50kg sprinter, starting from rest, runs 50m in 7.0s at constant acceleration.(adsbygoogle = window.adsbygoogle || []).push({});

a) What is the magnitude of the horizontal force acting on the sprinter?

b) What is the sprinter's power output at 2.0s, 4.0s, and 6.0s?

I think maybe the 'magnitude' part is confusing me.

F = ma

V(avg) = (50-0)/(7-0) = 50/7

A = (50/7)/7 = 50/49

F= 50kg * 50/49

F is exactly half of what the answer in my book says, what do I need to do and why?

Thank You,

in advance =o

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# Homework Help: Horizontal Force

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