(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A very silly person, intent on catching pigeons on the roof of an apartment building, trips and falls a distance of 44.6 m. She lands on a metal garbage can, crushing it to a depth of 0.453 m and walks away without having been hurt. What acceleration did she experience during the collision?

And also...

A parachutist jumps from an airplane and freely falls y=49.1 m before opening his parachute. Thereafter, he decelerates at a=1.92 m/s2. As he reaches the ground, his speed is 2.90 m/s. How long was the parachutist in the air?

My answer was 11.73 s, which was correct.

The second part of the question is: At what height did the parachutist jump from his plane? This is the one I can't figure out.

2. Relevant equations

s_f = s_i +v_it + 0.5at^2

3. The attempt at a solution

I couldn't get anywhere with them!

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# Homework Help: What acceleration did she experience during the collision?

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