An electric motor in a crane while lifting a load produces a tension of `4000 N` in the cable attached to the load. If the motor is winding the cable at the rate of `3ms^(-1)`, the power of the motor espressed in kilo watt units must be

An electric motor creates a tension of 4500 newton in a hoisting cable and reels it at the rate of 2 m//s . What is the power of the motor ?

A electric motor creates a tension of 4500 N a hoisting cable and reels it at a rate of 2m*s^(-1) . Calculate the power of the motor.

A motor pump lifts water from an average depth of 15 m at the rate of 5 kg per second. If the water is coming out of the pump with a velocity of 4 ms^(-1) , the power of the motor is (g = 10ms^(-1))

An electric motor exerts a force of 40 N on a cable and pulls it by a distance of 30 m in one minute. The power supplied by the motor (in Watts ) is

An electric motor raises a load of 0.2 kg, at a constant speed, through a vertical distance of 3.0 m in 2 s. If the acceleration of free fall is 10 m//s^(2) , the power in W developed by the motor in raising the load is :

An electric motor is used to lift an elevator and its load (total mass 1500kg) to a height of 20m. The time taken for the job is 20s. What work is done ? What is the rate at which work is done. If efficiency of the motor is 75% , at which rate is the energy supplied to the motor?

A motor has an electrical input of 30 kJ and is used to raise 100 kg load to a height of 25 m when fitted to a crane winch. What is the efficienty of winch ? (g=10 ms^(-1))