3) C

Formula for kinetic energy = ½mv²

Let mass of P and Q be ‘m’

KE of P = ½m10² = 50m J

KE of Q = ½m20² = 200m J

So, KE of Q is four times P

The squared in the KE formula makes it four times.

Then the height of Q will be twice of P.

So GPE of Q would be twice as much as P.

This corresponds to option C.

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