NDA ||Physics || Work,Power and Energy_Quiz_2020

Gaurav runs up a flight of 20 steps in 30 seconds. If each step is 20 cm high and mass of Gaurav is 50Kg. Calculate power of Gaurav?

A 12 HP motor has to be operated 8 hours/day. How much will it cost at the rate of 50 paisa/kWh in 10 days

Work done on or by a gas, in general depends upon the

A block of mass 20 kg is moving in x-direction with a constant speed of 10 ms^-1. It is getting applied by a retarding force F = (-0.1x) N during travel the distance from x = 20 m to x = 30 m. Its final kinetic energy will be

A person is holding a bucket by applying a force of 10N. He moves a horizontal distance of 5m and then climbs up a vertical distance of 10m. Find the total work done by him