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3 The US athlete Florence Griffith Joyner won the 100 m sprint gold medal at...

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3 The US athlete Florence Griffith Joyner won the 100 m sprint gold medal at Seol Olympic 1988 setting a new Olympic record of 10 54 s Assume that she achieved her maximum speed in a very short time and then ran the race with that speed till she crossed the line Take her mass to be 50 kg a Calculate the kinetic energy of Griffith Joyner at her full speed b Assuming that the track the wind etc offered an average resistance of one tenth of her weight calculate the work done by the resistance during the run c What power Griffith Joyner had to evert to maintain uniform spoed

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