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A block of mass 24.1 kgkg  is placed on a rough surface inclined relative to the ground...

A block of mass 24.1 kgkg  is placed on a rough surface inclined relative to the ground at an angle αα . The coefficient of kinetic friction is 0.25 and the coefficient of static friction is 0.37.

A)The incline angle αα is increased until the block starts to move, find the critical angle at which slipping of block occurs.

B) Find the acceleration once the block started to move at critical angle.

C) Find the speed of the block be moving after it has slid a distance 4.5 mm along the lincline?

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