when the athlete holds the barbell overhead, the reaction force is the weight of the barbell...
when the athlete holds the barbell overhead, the reaction force is the weight of the barbell on the hand. how does this force vary for the case in which the barbell is accelerated upwards? how does this force vary for the case in which the barbell is accelerated downwards?
Homework Answers
When the barbell is accelerated upward, the force exerted by the athlete is greater than the weight of the barbell. (The barbell, simultaneously, pushes with greater force against the athlete.)
When acceleration is downward, the force supplied by the athlete is less. (because barbell pushes with less force aganist the athlete)
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