You and your friend are going cycling. At one point, you are going downhill and

Question

You and your friend are going cycling. At one point, you are going downhill and the brakes fail. You manage to steer the bike away from a concrete wall and into a haystack. As you get up escaping without serious injury, your friend, who knows you are taking physics asks “Why, based on physics, did you not get as hurt now as we would have if you had ridden into the concrete wall?” What is your answer? Explain your reasoning.

HINT: When you explain your reasoning you need to describe your answer clearly and completely by providing all reasons that support your answer.

Explanation / Answer

its that impact force is defined as change in momentum with respect to time
F=change of momentum/time
in hay stack the time taken is more and in concrete wall it is very less

so the impact force is high for concrte wall even for the same change of momentum

so its better to crash into a haystrack dan a concrete wall

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