In the figure, the coefficient of kinetic friction between the block and incline

Question

In the figure, the coefficient of kinetic friction between the block and inclined plane is 0.25, and angle ? is 68

In the figure, the coefficient of kinetic friction between the block and inclined plane is 0.25, and angle ? is 68 degree . (a) What is the acceleration (including sign) of the block if the block is sliding down the plane? Take the direction down the plane to be the positive direction. (b) What is the acceleration (including sign) of the block if the block is sliding up the plane? Take the direction down the plane to be the positive direction.

Explanation / Answer

a) g.sin 68 - 0.25x g x cos 68 = 8.168 m/s^2

b) g.sin 68 +0.25x g x cos 68= 10 m/s^2 down the slop

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