Question

To compute the energy used by a motor, multiply the power that it draws by the time of operation. Con- sider a motor that draws 12.5 hp for 16 h/day, five days per week. Compute the energy used by the mo- tor for one year. Express the result in ft.lb and W.h

Answer 1

E=52000Hp.h

E=38724920Wh

E=1.028x10^11 ftlb

Step-by-step explanation:

To solve this problem you must multiply the engine power by the time factor expressed in h / year, to find this value you must perform the conventional unit conversion procedure.

Finally, when you have the result Hp h / year you convert it to Ftlb and Wh

`E=(12.5hp)((16h)/(day) )((5 days)/(week) )((52week)/(year) )\\`

E=52000Hp.h

`E=52000Hp.h((744.71Wh)/(Hp.h) )\\`

E=38724920Wh

`E=52000Hph((1977378.4  ft lb)/(1Hph)`

E=1.028x10^11 ftlb