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A 5 kg block is at rest on a 20° surface, where ?s = 0.65. If...

A 5 kg block is at rest on a 20° surface, where ?s = 0.65. If an additional pulling force FP is applied in a direction perpendicular to the surface, what would the magnitude of that force have to be in order for the block to slide down the surface? a) 15.6 N b) 18.1 N c) 20.3 N d) 19.2 N e) 22.1 N

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