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ChEJosh
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Homework Statement
A block slides down a slope from point O with initial speed V. THe sliding coefficient, mu, brings the block to rest at time T. Using the ramp as the x-axis and the perpendicular as the y-axis, find T.
Homework Equations
F = ma
mu = mg sin(theta)
a=dv/dt
The Attempt at a Solution
I'm taking modern physics, and this is a problem to demonstrate how picking different frames of reference can change a problem. I have to take the axes as the vertical and horizontal after solving this part, butI haven't had general physics in about 3 years, so I'm just not sure how to do the easy part. I think if I get this part I can get the second, I just need a small refresher.
I was thinking somewhere along the lines of this:
ma = mg sin(theta) - mu
dv/dt = g sin(theta) - mu/m
dt = dv/(g sin(theta) - mu/m)
Maybe? But, I'm not sure how I should do that derivative.
Thanks!