Question

1. A bullet fired from a gun is more dangerous than an air molecule hitting a person, though both

bullet and air molecule are moving with same velocity. Explain.

2. Why are road accidents at high speeds very much worse than accidents at low speeds?.

Answer 1

A bullet has more mass than a molecule. So, the force required to change the momentum of a bulet is higher than the force required to change the momentum of a molecule. This is why a bullet is dangerous or fatal compared to a molecule even when both have the same velocity.

Thus, when a molecule hit our body it bounces back and the impact of the molecule is not even felt. While a bullet will pierce our body and break bones with its impact on our body.