An athlete whose mass is 86.0 kg is performing weight-lifting exercises. Starting from the rest position, he lifts, with constant acceleration, a barbell that weighs 580 N . He lifts the barbell a distance of 0.70 m in a time of 1.4 s . Use Newton's laws to find the total force that his feet exert on the ground as he lifts the barbell. Express your answer using two significant figures.
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An athlete whose mass is 86.0 kg is performing weight-lifting exercises. Starting from the rest posi...
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