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Can any object have mechanical energy even if its momentum is zero? Explain.
Yes, If the momentum of an object is zero, this means $mv=0$
$\Rightarrow v=0$, $m≠0$
If $v=0$, then kinetic energy $K=\frac{1}{2}mv^2=0$
Mechanical energy$=$Kinetic energy$+$Potential energy
Or $Mechanical energy$=$Potential energy
Therefore, an object can have mechanical energy even if its momentum is zero.
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