Question

Name and explain 3 ways in which momentum and kinetic energy are not conserved when they should be

Answer 1

During these type of collision or interaction, Kinetic energy doesn't remain conserved (a) Inelastic collision (b) Perfactly Inelastic collision (c) Super collision

(a) In elastic collision: During this collision Initial and final momentum remains conserved, but final kinetic energy is less than that of initial kinetic energy. some part of initial kinetic energy is stored in elastic

energy of colliding bodies.

(b) In perfectly elastic collision Momentum remains conserved, but after collision two colliding bodies stick together and move with combined Velocity, so final energy is very less than initial kinetic energy.

(c) super collision is example of explosion of bomb, initial kinetic energy of constitutes particles is nearly zero, but when it explodes final kinetic energy of all constitutes particles together is very very large.

In elastic collision both momentum and kinetic energy remain conserved.