Question

Which of the following is not an example of perfectly inelastic collision?
A. A bullet fired into a block, if bullet gets embedded into the block
B. Capture on an electron by an atom
C. A man jumping onto a moving boat
D. A ball bearing striking another ball bearing

Answer 1

Hint: In case of perfectly inelastic collision, the two bodies move together with same velocity. A bullet striking the bag of sand, capturing of electrons by a proton and a man jumping into the moving cart are examples of perfectly inelastic collisions.
An elastic collision is a collision wherein there may be no net loss in kinetic energy withinside the system due to the collision. Both momentum and kinetic energy conservation takes place in elastic collisions.

Complete step by step answer:
An inelastic collision is a collision where there is a loss of kinetic energy. While momentum of the any system is conserved in an inelastic collision, kinetic energy is not conserved. Suppose comparable trolleys are journeying in the direction of every other. They collide, however due to the fact the trolleys are prepared with magnetic couplers they are part of collectively within the collision and come to be single connected mass. This sort of collision is flawlessly inelastic due to the fact the most viable kinetic energy has been lost without any conservation. This does not suggest that the very last kinetic energy is always zero; momentum still be conserved.

Therefore the answer is Option (D). A ball bearing striking another ball bearing.

Note: In ball bearing striking into another ball bearing, the momentum of the balls system is conserved but kinetic energy is lost. Therefore it is not an example of perfectly inelastic collision though.