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Static friction opposes gravity, which acts to pull a wood block down an inclined plane. What...

Static friction opposes gravity, which acts to pull a wood block down an inclined plane. What is the total value of the gravitational force (Fg) and the force due to friction (Ff) in Newton’s if the wood block is sitting on a flat surface? (A) 0 N (B) 9.8 N (C) 4.9 N (D) 2.8 N

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Answer #1

(A) 0 N

As the block is at rest net force acting on the block must be zero.

component of gravity acts parallel to the surface towards down but static friction acts parallel to the surface towards up.

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