# When will you go away?

Classical Mechanics Level 5

Consider a rod of length $$l$$ and mass $$m$$ resting against a smooth vertical wall and making an angle of $$\theta$$ with the horizontal smooth floor.

The rod is released from rest, initially making an angle of $$75^{\circ}$$ with the horizontal. The rod falls and at some angle $$\theta$$ it loses contact with the vertical wall. Find this $$\theta$$ (in degrees).

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