Question

How can we say that K.E energy is conserved in Elastic Collision?

How can we say that K.E energy is not conserved in Inelastic Collision?

State a reason to satisfy your ans

(For 3 marks)

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Answer 1

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Elastic Collision : The collisions in which both momentum and kinetic energy of the system are conserved are called elastic collisions.

Reason : Initial and final Kinetic energy of the colliding bodies remain same, this is only obeyed by bodies in elastic collision as in perfectly elastic collision, there is no net conversion of kinetic energy into other forms such as heat, noise, or potential energy.

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Inelastic Collision : The collisions in which the momentum of the system is conserved but the kinetic energy is not conserved are called inelastic collisions.

Reason : Generally collisions in daily-life are inelastic collisions. The kinetic energy lost in an inelastic collision appears in some other form of energy such as heat, sound, etc.

Answer 2

Answer:

In an elastic collision, not only is momentum is conserved, but also kinetic energy. The total kinetic energy of the system (which includes the objects that collide) is the same before and after the collision. ... In an inelastic collision, momentum is conserved, but the total kinetic energy of the system is not conserved.