Arunner whose mass is 54 kg accelerates from a stop to a speed of 7 m/s in 3 seconds. (a good sprinter can run 100 meters in about 10 seconds, with an average speed of 10 m/s.) (a) what is the average horizontal component of the force that the ground exerts on the runner's shoes? (b) how much work is done on the point-particle system by this force?
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Arunner whose mass is 54 kg accelerates from a stop to a speed of 7 m/s in 3 seconds. (a good sprint...
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