Is it possible for a particle to have negative kinetic energy in a bar

1.	Is it possible for a particle to have negative kinetic energy in a barrier?
Answer» No NEVER...KINETIC Energy can never be negaive... As K.E = $\frac{1}{2} m {v}^{2}$ Here m = mass of a particle...which is a scalar quantity and we dont have negative mass... v = velocity of a particle , THOUGH velocity is a vector quantity so it can be negative...But we have square of velocity which makes velocity always POSITIVE....(square of any number whether a negative or positive always a positive) So K.E cannot be negative...Atmost it can be zero only if velocity of a particle is zero or particle is at rest..

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Is it possible for a particle to have negative kinetic energy in a barrier?

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