A runner in a sprint race reaches 9ms^1 in 3s from the start of the race if her mass is 50 kg what force much she exert in order to do this ?
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The final answer is 150 N
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F=ma
F=50kg×9-0/3m/s²
F=50×3
F=150N
F=50kg×9-0/3m/s²
F=50×3
F=150N
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