A ladder of length L is slipping with its ends against a vertical wall and a horizontal floor. At a certain moment, the speed of the end in contact with the horizontal floor is v and the ladder makes an angle θ=30∘ with horizontal. Then, the speed of the ladder's centre of mass must be-

A ladder of length L is slipping with its ends against a vertical wall

1.	A ladder of length L is slipping with its ends against a vertical wall and a horizontal floor. At a certain moment, the speed of the end in contact with the horizontal floor is v and the ladder makes an angle θ=30∘ with horizontal. Then, the speed of the ladder's centre of mass must be-
Answer» A ladder of length $L$ is slipping with its ends against a vertical wall and a horizontal floor. At a certain moment, the speed of the end in contact with the horizontal floor is $v$ and the ladder makes an angle $θ = 30^{\circ}$ with horizontal. Then, the speed of the ladder's centre of mass must be-

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A ladder of length L is slipping with its ends against a vertical wall and a horizontal floor. At a certain moment, the speed of the end in contact with the horizontal floor is v and the ladder makes an angle θ=30∘ with horizontal. Then, the speed of the ladder's centre of mass must be-

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