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Question

A block is lying on an inclined plane which makes 60o with the horizontal. If coefficient of friction between block and plane is 0.25 and g=10 m/s2, then acceleration of the block when it moves along the plane will be


A

2.50 m/s2

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B

5.00 m/s2

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C

7.4 m/s2

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D

8.66 m/s2

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Solution

The correct option is C

7.4 m/s2


a=g(sinθμ cosθ)=10(sin 60o0.25 cos 60o)
a=7.4m/s2


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