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fleur
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Homework Statement
Jim stands with a ball at the rear of a diving board, 10 m above the
surface of a swimming pool. His friend Bob is swimming below, at a
horizontal distance of 6 m from the front of the board. Jim thinks it
would be funny to roll his ball along the diving board so that it drops on
Bob’s head. Assuming that the effects of friction and air resistance are
negligible, calculate the speed (in m s-1) at which Jim must roll the
ball.
Homework Equations
s=u+1/2at^2
speed=distance/time
The Attempt at a Solution
rearranged s=u+1/2at^2 to find t
t=1.1s
speed 6/1.1=5.45m/s
However the answer is 4.20m/s
where did I go wrong?