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how to work out kinetic energy lost. The work-energy theorem can be derived from Newtons second law. And when we say energy is lost as heat we really mean the energy is dissipated spread out into the environment it is not gone from the Universe.
M mass of a body. And when we say energy is lost as heat we really mean the energy is dissipated spread out into the environment it is not gone from the Universe. V velocity of a body.
In terms of energy friction does negative work until it has removed all of the packages kinetic energy.
The kinetic energy is not lost. W DKE 1 2mv2 f 1 2mv2 i W D KE 1 2 mv f 2 1 2 mv i 2. Hence this gives us a way of finding the distance traveled after the person stops pushing. KE kinetic energy.