Work & Energy — Set 4

If a force acts on a body but the displacement is zero, the work done is?

What is the dimensional formula of power?

A person of weight 600 N climbs a staircase of height 5 m. How much work is done against gravity?

Work done in stretching a spring from its natural length to extension x is?

1 calorie of heat is approximately equal to?

The law of conservation of energy states that energy?

A force of 10 N acts opposite to displacement of 3 m. What is the work done?

A force is conservative if the work done by it over a closed path is?

Find the gravitational potential energy of a 2 kg mass at height 5 m. (Take g = 9.8 m/s^2)?

If a spring’s extension is doubled, its elastic potential energy becomes?