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June 2015 p41 q3
4050
A block of weight 6.1 N slides down a slope inclined at \(\arctan\left(\frac{11}{60}\right)\) to the horizontal. The coefficient of friction between the block and the slope is \(\frac{1}{4}\). The block passes through a point A with speed 2 m s\(^{-1}\). Find how far the block moves from A before it comes to rest.
Solution
First, calculate the frictional force \(F\) using the formula: