Asked by physics8ater
A boy jumps from a wall 3m high. What is an estimate of the change in momentum of the boy when he lands without rebounding?
the answer is 5x10^2kg/ms, but how?
the answer is 5x10^2kg/ms, but how?
Answers
Answered by
Scott
what's his mass?
momentum is ... m * v
his velocity is ... √(2gh) = √(2 * 9.8 * 3)
momentum is ... m * v
his velocity is ... √(2gh) = √(2 * 9.8 * 3)
Answered by
physics8ater
it didn't say:(
Answered by
Scott
so the question is "estimating" his mass to be about 65 kg (143 lbs)
... a reasonable number
but a very poor question
... a reasonable number
but a very poor question
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