In law of conservation of KE, conserved quantity is
a) KE
b) momentum
c) both KE & momentum
d) neither KE nor momentum
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The truly conserved quantity is the sum of kinetic, potential, and thermal energy. For example, when a block slides down a slope, potential energy is converted into kinetic energy. When friction slows the block to a stop, the kinetic energy is converted into thermal energy.
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