Question

Tommy Lee, who weighs 170 lbs, is to be lifted 20 ft into the air on a platform to play a drum solo. The platform and drums, which together weigh 250 lbs, are lifted by a chain weighing 10 lbs/ft which is attached to a pulley 40 ft in the air. How much work is done in raising the Motley Crue drummer into the air? 040 (820 - 103) de JO (820 – 107) des " (620 – 10z) de 620 – 102) de •

Answer 1

(170+250 +20(10) = 620 lb (be cause Pulley is a at hoft, height) XHE 20 Iftika K 20 (10) K 170+250 +40 (10) = 820 db. Bx = 620 + 20-x (20)(Po) =Byx = 620 + 200-fox. = 820-60 x ... work done w = {(820 tox) dx 1 x=0 20 - Second option is correct