Advertisements
Advertisements
प्रश्न
A pump raises water by spending 4×105J of energy in 10s. Find the power of the pump.
Advertisements
उत्तर
Energy spent = w = 4 × 105J
Time taken = 10s
Power = Energy / Time
P = `(4 × 10^5)/10` = 4×104 W
APPEARS IN
संबंधित प्रश्न
Rajan exerts a force of 150 N in pulling a cart at a constant speed of 10 m/s-1. Calculate the power exerted.
The expression of power P is
It takes 20 s for a girl A to climb up the stairs while girl B takes 15 s for the same job. Compare the work done .
It takes 20 s for a girl A to climb up the stairs while girl B takes 15 s for the same job. Compare the power spent by then.
Differentiate between watt and watt hour.
Arrive at an expression for power and velocity. Give some examples for the same.
A ball with a velocity of 5 ms−1 impinges at an angle of 60˚ with the vertical on a smooth horizontal plane. If the coefficient of restitution is 0.5, find the velocity and direction after the impact.
Sand is being dropped from a stationary dropper at a rate of 0.5 kgs-1 on a conveyor belt moving with a velocity of 5 ms-1. The power needed to keep belt moving with the same velocity will be ______.
Name the quantity which is measured in kW.
Name the quantity which is measured in Wh.
