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A small body A starts sliding down from the top of a wedge (see fig) whose base is equal to l. The coefficient of friction between the body and wedge

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A small body A starts sliding down from the top of a wedge (see fig) whose base is equal to l. The coefficient of friction between the body and wedge surface is `mu= 1.0`. At what value of angle q will the time of sliding be least?
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Correct Answer - `theta = 62.5 ^(@)`
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