Question

If a shell fired from a canon is exploded in air then-

• A. Momentum decreases
• B. Momentum increases
• C. Kinetic energy increases
• D. K.E. decreases

Answer 1

The correct option is C Kinetic energy increases

There is a change in internal energy, thus no change in momentum.

When a body explodes, a large amount of internal potential energy is released, which then converts into the only form of energy presently valid, kinetic energy, thus increasing it.