Pepe, the clown, is jumping on a trampoline as Babette, the tightrope walker, above him suddenly loses her balance and falls off the tightrope straight toward Pepe. Pepe has just started upward at 15.0 m/s when Babette begins to fall. Pepe catches her in midair after 10.0s. a) How far has Babette fallen when she is caught by Pepe? b)What is Babette's velocity at the time of contact? c) What is Pepe's velocity at the time of contact? d) How far above the trampoline was Babette before she fell?(adsbygoogle = window.adsbygoogle || []).push({});

a) d= -491m

b) I used v final^2=v initial^2 + 2ad, but the answer key uses v final=v initial +ad. Why doesn't v final and v initial have squares? The answer comes out to be the same as mine except mine is missing the negative, so i'm supposing the ans key is right, but i don't understand how vf^2 andvi^2 can change into vf and vi without the other parts of the equations being square rooted.

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# Homework Help: Free Fall physics homework

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