text: wearing helmet while riding a bike greatly reduces the force on the skull if a rider is involved in? a collision. explain why this is so..... please help me guys my homework...... well helmets have cushining inside them so that serves as a shock absorber. the lightweight and soft medium between your head and the object colliding with it dims the force.  for example, yelling through an empty hall will allow the sound to travel easily, but if you stuck in another wall reaching from roof to floor with no gaps then the sound would be dimmed out and would have a smaller impact. the wall would absorb the sound.