ippo90
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Homework Statement
A box with mass m is on the top of a slope with angle alpha. Every surface has no friction. Assume that the system starts off from resting position. The start position of the box is P, and has a height h over the horizontal plane. Find the velocity of the block with the slope when the box has reached the horizontal plane ground. The mass of the slope block is M.
Homework Equations
-I believe that the relevant eq. are:
m1v1+m2v2=m1v1'+m2v2'
where v1' and v2' are the velocities after a collision etc.
-law of energy: 1/2mv2=mgh
-definitions of cosine and sine
-timeless eq for velocity: v2=vo2+2as
The Attempt at a Solution
Because we are assuming that the system starts off from resting state, v1 and v2=0
hence mv1'=(m+M)v2' [they will move in different directions]
we want to find v2'. Therefore I tried to express v1' in terms of angle, height. It turned out to be all wrong. What did i do wrong?
I hope someone will help me with this. I've used like 3 hours or so..
thank you