A.For inelastic collisions, which conservation laws apply? B.For completely inel

Question

A.For inelastic collisions, which conservation laws apply? B.For completely inelastic collisions which conservation laws apply? C.For elastic collisions, which conservation laws apply? D.Which condition is both necessary and sufficient to apply conservation of linear momentum? Potential Energy is zero Total Momentum is zero Net torque is zero Net external force is zero For a system where energy is conserved, which of the following is true? Energy may convert from kinetic to potential and vice versa without any loss of energy Total kinetic energy is constant Total momentum is constant Total potential energy is constant

Explanation / Answer

For inelastic and perfectly inelastic collisions- Only conservation of linear momentum applies but , conservation of kinetic energy can't be applied. kinetic energy is not conserved due to the action of internal friction.

For elastic collisions, however, both conservation of energy and linear momentum applies.

For application of conservation of linear momentum, the net external force has to be 0.

For a system when energy is conserved

=> Energy may convert from kinetic to potential and vice versa without any loss of energy

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