A rock of mass m dropped to the ground f...

A rock of mass m dropped to the ground from a height h. A second rock with mass 2m is dropped from the same height. When second rock strikes the ground, what is its kinetic energy?

Twice that of the first rock

Four times that of the first rock

The same as that of the first rock

Half that of the first rock

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Verified by Experts

The correct Answer is:

`K.E=(1)/(2)mv^(2)`
`K.Epropm`

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