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Asked by Ashley

A ball thrown upward reaches a height of 13m. How much time did it take to get to this height? How much time will take to fall to the ground?

14 years ago

Answers

bobpursley
consider energy.
InitialKineticEnergy=finalPotentialEnergy
1/2 mv^2=mg*13

V =sqrt(2*9.8*13) that is the initial velocity.
the average velocity going up is half that, so time up= 12/(1/2 sqrt(2*9.8*13)

grab your calculator.

Time down is the same as time up.
14 years ago
Anonymous
yhtrh
9 years ago

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