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6N (a)60N

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in Engineering Mechanics by (701k points)
6N

(a) 60N

(b) 100N

(c) 70.7N

I got this question in a national level competition.

The question is from Frictional Forces on Flat Belts topic in division Friction of Engineering Mechanics

1 Answer

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Correct answer is (a) 60N

The explanation is: The component of the force in the v axis, it is equal to 100cos(15˚). This is the application of the triangle over the figure. Try to resolve the components of the given force. It will be easy. This is one of the simplest examples of solving for the forces acting over the belts.

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