Question

A football player hit a brick instead of football he got hurt but brick did not move greatly.why he did get hurt and why brick do not move?

Answer 1

I tried this:

Explanation:

I would think of it in terms of Collisions .

We can have two types of scenarios:

1) Elastic Collision: the footballer kicks a football; the energy is transferred (let us say) completely from the foot to the ball. The ball flies away having acquired energy (Kinetic) while the foot remains (ideally) unaffected;

2) Inelastic Collision: the foot and the brick remain in contact and the original energy delivered by the foot has no place to go! It remains "inside" the foot causing recoil, vibration and a dynamic pressure that will cause damage in the softer (compared to the brick) tissues of the foot.

I would think of your scenario as an extreme inelastic collision where there is no resultant movement and where the energy will be used (unfortunately) to damage the foot of the footballer!