Originally an engineering studies question but yea.
A crane uses a DC electric motor to lift a mass of 250 kg vertically from the ground. After 18 seconds the mass is 20 metres off the ground with an upward velocity of 2m/s. Determine the average power required by the motor to perform this lifting operation.
Since P=w/t should i use P=fs/t or P= (1/2 mv^2+mgh)/t
A crane uses a DC electric motor to lift a mass of 250 kg vertically from the ground. After 18 seconds the mass is 20 metres off the ground with an upward velocity of 2m/s. Determine the average power required by the motor to perform this lifting operation.
Since P=w/t should i use P=fs/t or P= (1/2 mv^2+mgh)/t