Advertisements
Advertisements
Question
A pump raises water by spending 4×105J of energy in 10s. Find the power of the pump.
Advertisements
Solution
Energy spent = w = 4 × 105J
Time taken = 10s
Power = Energy / Time
P = `(4 × 10^5)/10` = 4×104 W
APPEARS IN
RELATED QUESTIONS
Power P= ............ /time taken.
1 H.P. is equal to
What is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop?.
A quarter horse power motor runs at a speed of 600 r.p.m. Assuming 40% efficiency, the work done by the motor in one rotation will be
An engine develops 20 kW power. How much time will it take to lift a mass of 200 kg to a height of 50 m? (g = 10 m/s2)
Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional force are 10% of the input energy. How much power is generated by the turbine? (g = 10 m/s2)
Calculate the power of a crane in watts, which lifts a mass of 100 kg to a height of 10 m in 20s.
A man is throwing bricks of mass 2 kg onto a floor from a height of 2 m. Bricks reach the floor at a speed `2sqrt(10)` m/s. Man throws 10 bricks in a minute. If the power of man is W watt then `3/10` W is equal to ______ W.
Name the quantity which is measured in kW.
