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November 24th, 2007, 05:05 AM   #1
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physics problem

a railcart moves along a railway at constant velocity v_0 with a ball attached to its ceiling. at t=0 the ball is drooped from the ceiling and at the same time the railcart breaks are pushed creating deceleration such that its velocity is:
v=v_0e^(-pt)
h is the distance between the ceiling and the floor.
in which horizontal distance will the ball hit the floor of the railcart. given v_0 =70m/sec
h=180m p=0.0185 1/sec g=10m/sec^2
wha t i did was integrate the V and use the time i got from the equation (x=v0t+(at^2)\2) in order to find the answer
but i got -3386.25m and this answer is wong
would you give me a hand
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November 24th, 2007, 12:03 PM   #2
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solved
never mind
thanks
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