Posted by Olivia on Monday, January 16, 2012 at 1:48pm.
You must figure out how far the ball falls vertically (not the distance down the track but that times the sin of the inclination angle of the track from horizontal)
then v^2 = 2 g h
where h is that falling distance in meters
g is gravity acceleration, about 9.8 m/s^2
v is speed in meters.second.
That comes from conservation of energy
(1/2) m v^2 + m g h = constant
h goes down. v goes up
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