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Old Dec 25th 2010, 03:28 PM   #1
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Kinematics question

I would like a *hint* to this problem - perhaps the first unknown to solve for.

During training, an aerial skier takes off from a ramp that is inclined at 40.0 degrees to the horizontal and lands in a pool that is 10.0 m below the end of the ramp. If she takes 1.50 s to reach the highest point of her trajectory, calculate:

a. the speed at which she leaves the ramp

I've drawn a right angled triangle. I'm stuck because there is no initial velocity, no height and no displacement given. What should I first try for?

TIA,
xtheunknown0
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Old Dec 25th 2010, 05:42 PM   #2
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you know how much time it took from the ramp (initial speed point) to the highest point (zero vertical speed point)

you know the vertical acceleration

you get the initial speed
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