An 80 kg stuntman jumps out of a window that's 45m above the ground Q. How fast is he falling when he reaches ground level?

An 80 kg stuntman jumps out of a window that's 45m above the ground Q

1.	An 80 kg stuntman jumps out of a window that's 45m above the ground Q. How fast is he falling when he reaches ground level?
Answer» Solution :His gravitational potential energy turns into kinetic energy: MGH=`(1)/(2)MV^(2)`, so `v=sqrt(2gh)=sqrt(2(10)(45))=30m//s` (You COULD also have answered this question using BIG FIVE #5).

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An 80 kg stuntman jumps out of a window that's 45m above the ground Q. How fast is he falling when he reaches ground level?

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