World-class sprinters can accelerate out of the starting blocks with
World-class sprinters can accelerate out of the starting blocks with an acceleration that is nearly horizontal and has magnitude 15m/s2.
1) How much horizontal force
F must a sprinter of mass 51kg exert on the starting blocks to produce this acceleration?
2) Which body exerts the force that propels the sprinter, the blocks or the sprinter?
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