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h t t p : / / w w w .j i s k h a . c o m/ d i s p l a y . c g i ? i d = 1 2 5 0 8 1 6 5 0 6 Don't know how to do that
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The 100 m dash can be run by the best sprinters in 10.0 s. A 62 kg sprinter accelerates uniformly for the frist 45 m to reach top speed, which he maintains for the remainding 55 m. (a) What is the average horizontal component of force exerted on his feet
