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TrpnBils
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Homework Statement
A wet bar of soap (m=150g) slides down a 2m long ramp at 7.3° relative to the horizontal. How long does it take to reach the bottom?
Homework Equations
d = 1/2at2
The Attempt at a Solution
The answer is apparently 1.81 seconds, although I can't figure out how.
I can figure out the height of the ramp to be 0.25m, but using the equation above tells me that it should only take 0.22 seconds if you use gravity as the acceleration. What am I doing wrong?