Question

Which of the following is not an example of perfectly inelastic collision?

• A. A bullet fired into a black if bullet gets embedded into block
• B. Capture of electrons by an atom
• C. A man jumping on to a moving boat
• D. A ball bearing strinking another ball bearing

Answer 1

Answer: (D)

A ball bearing strinking another ball bearing

Answer 2

Whenever there is a collision between two bodies, the total momentum of the bodies remains conserved. If after the collision of two bodies, the total kinetic energy of the bodies remain the same as it was before the collision, then it a perfectly elastic collision. A ball bearing striking another ball bearing is an example of elastic collision. If two bodies stick together after the collision, then the collision is said to be perfectly inelastic collision. Options (a), (b), (c) are examples of inelastic collision.