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Q.

In the arrangement shown in the figure [sin 37° = 3/5]

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a

magnitude of force of friction is 56 N

b

the magnitude of force of friction is zero

c

the tension in the string is 20 N

d

direction of force of friction is up the plane

answer is A.

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Detailed Solution

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Net driving force = 60 - 40 = 20 N(down the plane)

As resisting force is greater than net driving force, the friction will be static of nature and friction force is 20 N (up the plane)

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