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  • Can any object have mechanical energy even if its momentum is zero? Explain.

Can any object have mechanical energy even if its momentum is zero? Explain.

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Solution.
Mechanical energy is the sum of kinetic energy and potential energy. It is also known as total energy. 
Kinetic energy is the virtue of motion which comes with speed.
KE=\frac{1}{2}mv^{2}

Potential energy is the virtue of position which comes with a height from the ground surface.
PE=mgh
As the object has zero momentum, it means it is not moving.
Momentum is defined as the product of mass and speed.
P = mv
A body at rest and some height from the ground will have potential energy or mechanical energy.

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