Answer :

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




So,




W = Final Kinetic energy-initial kinetic energy


W = Change in kinetic energy


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