Correct Answer - Option 3 : Sum of Kinetic Energy and Potential Energy
Concept:
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Potential Energy: The energy of an object obtained by doing work against the conservative forces like spring force and gravitational force is called potential energy.
- The Gravitational potential energy of an object at a height h from the ground is given as
P = mgh
The spring potential energy of spring when it is stretched x distance from its natural length is given as
\(P = \frac{1}{2}kx^2\)
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Kinetic Energy: The energy obtained by an object by virtue of its motion is called kinetic energy.
\(K = \frac{1}{2}mv^2\)
K is kinetic energy, v is the speed of the object, m is the mass of the object.
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Mechanical Energy: The sum of potential energy and kinetic energy is called mechanical energy.
Explanation:
So, from the above concept, it is clear that total mechanical energy is the sum of potential energy and kinetic energy.
So, the answer is the Sum of Kinetic Energy and Potential Energy.