Energy

"ability to do work"

Energy (E): Unit - Joule

Mechanical Energy:

Energy from mechanical work.

Two types:

  1. Energy due to position.

Potential Energy (PE) = mgh

where g = acceleration due to gravity = 9.8 m/s^2


  1. Energy due to motion.

Kinetic Energy (KE) = 1/2 *m*v^2


Question:

  1. A body of 5kg raised to 2m find the potential energy stored in the body?

  2. A body of mass 2kg is moving with a speed of 20m/s Find the kinetic energy?

Related Topics:

  1. Work

  2. Energy

  3. Power