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A solid cylinder is kept on one edge of ...

A solid cylinder is kept on one edge of a plank of same mass and length 25 m placed on a smooth surface as shown in the figure. The coefficient of friction between the cylinder and the plank is 0.5. The plank is given a velocity of `20ms^(-1)` towards right. Find the time (in S) after which plank any cylinder will separate. `[g=10ms^(-2)]`

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