uestion 1 (1 point) A weight lifter picks up a barbell and 1. lifts it chest hig

Question

uestion 1 (1 point) A weight lifter picks up a barbell and 1. lifts it chest high 2. holds it for 30 seconds 3. puts it down slowly (but does not drop it) Rank the amounts of work W the weight lifter performs during these three operations. Label the quantities as Wi, W2, and W3 Justify your ranking order ans the anounth of wr W the weigh itr performs during these thee operations, Label the quantities as wi, w2, and wa. Hint: Think about how work is defined in terms of who is applying forces and who is doing work.) ab

Explanation / Answer

Work done during lift W1 = mgh at highest position is max

W2 = intermediate between two

and

W3 is least when placed on ground

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work done W = area under the graph

W = 76 J

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