Question

A shell explodes and many pieces fly off in different directions. The following is conserved.

• A. Kinetic energy
• B. Momentum
• C. Neither momentum nor Kinetic energy
• D. Momentum and Kinetic energy

Answer 1

Answer: (B)

Because during explosion of a shell, $F_{\text{ext}}=0$
hence according to law of conservation of momentum ${\vec{P}}_{\text{system}}=$ constant