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Can any object have mechanical energy ev...

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

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Yes. We know that mechanical energy = potential energy + kinetic energy
Momentum of a body `= m upsilon`
When momentum is zero, `upsilon = 0 (as m != 0)` and as such KE. =` (1)/(2) m upsilon^2 = 0`
Thus, mechanical energy = potential energy.
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