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A uniform plank of mass M and length L leans against a vertical wall. The initial...

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Physics

A uniform plank of mass M and length L leansagainst a vertical wall. The initial angle it makes with thehorizontal ground is 60º. It is let go from rest and slides downfrictionlessly. The moment it leaves contact with the wall, whatangle does it make with the ground? There is no frictionanywhere.

Answer & Explanation Solved by verified expert
4.4 Ratings (894 Votes)
For simplicity I will use as the angle between the ladder and the floor with at the beginning equal to 60 degrees Considering rotation of the ladder with respect to the instantaneous centre of rotation S    See Answer
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