Calculate the magnitude of the normal force on a 17.7 kg block in the following circumstances. a.The block is resting on a level surface. b.The block is resting on a surface tilted up at a 20.8° angle with respect to the horizontal. c.The block is resting on the floor of an elevator that is accelerating downward at 3.78 m/s2. d.The block is on a level surface and a force of 115 N is exerted on it at an angle of 20.8° above the horizontal.

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A: Page 1

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