The capacity of doing work is known as energy.
Mechanical energy has two types:
1. Kinetic energy- The energy possessed by any moving object by virtue of its motion is called kinetic energy
2. Potential energy- The energy possessed by a body by virtue of its shape and position.
The unit of energy is joule.
The work done (W) by a body is given by
W = F × s
W = ma × s
Now, if the body of mass m has initial velocity and final velocity as u and v respectively, then
W = Final Kinetic energy-initial kinetic energy
W = Change in kinetic energy
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