A rock of mass m is dropped to the ground from a height h. A second rock with a mass of 2m is dropped from the same height. When the second rock strikes the ground, what is its kinetic energy? twice that of the first rock four times that of first rock the same as that of the first rock half that of the first rock

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Dillan Perez · Accepted Answer

K.E.=12mv2Kinetic energy of first rock will be K.EFR=12mv2     …(1)Kinetic energy of second rock will be K.ESR=122mv2    …(2)K.EFRK.ESR=12mv2122mv2⇒K.EFRK.ESR=12⇒ K.ESR=2K.E.FRAnswer is twice that of the first rock.

A rock of mass m is dropped to the ground from a height h. A...

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