Find the power of the an electric motor if it lifts 200 kg of water in 5 minutes from a well of 120 m depth.

Find the power of the an electric motor if it lifts 200 kg of water in

1.	Find the power of the an electric motor if it lifts 200 kg of water in 5 minutes from a well of 120 m depth.
Answer» SOLUTION :Mass of water m = 200 kg , Depth of well = height lifted = 120 m Time `t = 5 xx 60` sec = 300 sec , POWER `= ("Work done against gravitational FORCE")/("time")` Power `= (mgh)/(t) = (200 xx 9.8 xx 120)/(5 xx 60) = 784 W`