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MHT CET Physics question

PhysicsWork, Energy and PowerMHT CET

A particle suspended by a light inextensible thread of length l is projected horizontally from its lowest position with velocity . The string will slack after swinging through an angle equal to

Answer: (C)

Solution

The string slackens when T = 0 at angle from the top: and by energy , so ,

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Question ID VK-039536