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## Homework Statement

The block was given an initial velocity up the surface with an angle of 45 degrees to the ground. Calculate the ##\frac{t_1}{t_2}## with ##t_1## being the time it took to get to the highest point up the hill and ##t_2## the time it took to get down. In both cases the frictional force with coefficient m= 0.2 was acting on it.

2. Homework Equations

3. The Attempt at a Solution

My tried solution is uploaded below in form of a picture.

I have made free body diagrams but am stuck at getting the equation that involves time so that i can divide the two times. Any hints?

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