Q13 of 28 Page 69

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

Yes, Objects have mechanical energy even if its momentum is zero. Mechanical energy is sum of both potential energy and kinetic energy.

Momentum = mv = 0 ∴ v=o since m can never be zero.


Hence, there is no kinetic energy but the object may possess potential energy. Since PE is the product of mass, gravitational constant and height


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