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SVEN [57.7K]
3 years ago
5

When you jump from an elevated position you usually bend your knees upon reaching the ground. By doing this, you make the time o

f the impact about 10 times as great as for a stiff-legged landing. In this way the average force your body experiences is
A) less than 1/10 as great.
B) more than 1/10 as great.
C) about 1/10 as great.
D) about 10 times as great.
Physics
1 answer:
Leona [35]3 years ago
3 0

Answer:

C) about 1/10 as great.

Explanation:

We use the relation between Impulse, I, and momentum, p:

I=\Delta p\\ F*t=m(v_{f}-v{o})\\ \\

F=m(v_{f}-v{o})/t=-mv{o}/t\\ \\     the final speed is zero

We can see that the average Force is inversely proportional to the time, so if the time is 10 times bigger, the average Force is 1/10 as great

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