Energy
"ability to do work"
"ability to do work"
Energy (E): Unit - Joule
Mechanical Energy:
Mechanical Energy:
Energy from mechanical work.
Two types:
Energy due to position.
Potential Energy (PE) = mgh
where g = acceleration due to gravity = 9.8 m/s^2
Energy due to motion.
Kinetic Energy (KE) = 1/2 *m*v^2
Question:
Question:
A body of 5kg raised to 2m find the potential energy stored in the body?
A body of mass 2kg is moving with a speed of 20m/s Find the kinetic energy?