Choose the correct alternative:1. When a conservative force does posit

1.	Choose the correct alternative:1. When a conservative force does positive work on a body, the potential energy of the body increases/ decreases/remains unaltered.2. Work done by a body against friction always results in a loss of its kinetic/potential energy.3. The rate of change of total momentum of a many particle system is proportional to the external force/sum of the internal forces on the system.4. In an inelastic collision of two bodies, the quantities which do not change after the collision are the total kinetic energy/total linear momentum/ total energy of the system of two bodies.
Answer» 1. decreases 2. kinetic energy 3. external force 4. total linear momentum and also total energy (if the system of two bodies is isolated).

Choose the correct alternative:1. When a conservative force does positive work on a body, the potential energy of the body increases/ decreases/remains unaltered.2. Work done by a body against friction always results in a loss of its kinetic/potential energy.3. The rate of change of total momentum of a many particle system is proportional to the external force/sum of the internal forces on the system.4. In an inelastic collision of two bodies, the quantities which do not change after the collision are the total kinetic energy/total linear momentum/ total energy of the system of two bodies.

Answer»

1. decreases

2. kinetic energy

3. external force

4. total linear momentum and also total energy (if the system of two bodies is isolated).

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