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Question

A block of mass m is placed on a rough inclined plane of inclination θ. Its downward motion can be just prevented by applying an upward pull force F, parallel to the plane and it can be made to just slide upward by applying a force 3F, parallel to the plane. The coefficient of friction between the block and the inclined plane is

m द्रव्यमान के एक गुटके को θ आनति के खुरदरे आनत तल पर रखा जाता है। इसकी नीचे की ओर गति को तल के समान्तर ऊपर की ओर खिंचाव बल F आरोपित करके ठीक रोका जा सकता है तथा तल के समान्तर 3F बल आरोपित करके इसे ठीक ऊपर की ओर सरकाया जा सकता है। गुटके तथा आनत तल के मध्य घर्षण गुणांक है

A
tanθ2
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B
tanθ3
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C
tanθ4
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D
3 tanθ
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Solution

The correct option is A tanθ2
Solution

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