Work, Power, and Energy

When work is done in the body,

• it loses energy

• it gains energy

• its energy remains constant

In order to do work, energy is

• lost

• transferred or converted

• used up

When a body Falls freely then the...

• Its potential energy is converted into kinetic energy.

• Its mechanical energy is converted into heat energy

• Its kinetic energy is converted into potential energy

Power is defined as

• p = t/W, where t is time and W is work

• p = W/d, where W is work and d is the distance

• p = W/t, where W is work and t is time

A constant force on an object given by-product of force and distance moved by object in direction of force is termed as

• Work done

• Power

• Energy

A compressed spring possesses

• Elastic Potential Energy

• Gravitational Potential Energy

• Kinetic Energy

When an object is raised to a certain height above ground, it possesses

• Kinetic energy

• Elastic Potential Energy

• Gravitational Potential Energy

The SI unit of work is –

• Newton

• Joules

• Pascal

The sum of kinetic and potential energy is –

• Mechanical Energy

• Light energy

• Heat Energy

Watt is the SI unit of –

• Power

• Force

• Work