Question (1 Viewer)

[axwe7]

How much work is done by a weight-lifter (1.6 m tall) lifting 250 kg from
the ground to 0.45 m above his head??

 

[porcupinetree]

W = Fs = mg*h = 250kg * 9.8 ms^-2 * (1.6+0.45) = 5.0 x 10^3 J (2 sig. fig.)

 

[v_k_9696]

gpe = -gmm/r


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