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32. Underline the correct alternative:(a) When a conservative force doespositive work on a body, the potentialenergy of the body increases/decreases/remains unaltered.(b) Work done by a body against frictionalways results in a loss of its kineticpotential energy.(c) The rate of change of total momentunmof a many-particle system isproportional to the external force/sum of the internal forces on thesystem.(d) In an inelastic collision of twobodies, the quantities which donot change after the collision arethe total kinetic energy/total linearmomentum/total energy of the systemINCERTof two bodies. |
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