(a) Find the normal force exerted on a 2.9 kg book resting on a surface inclined at 27° above the horizontal.
N
(b) If the angle of the incline is reduced, do you expect the normal force to increase, decrease, or stay the same?
physics!!! #4?
2016-11-19 12:45 am
回答 (1)
2016-11-19 2:03 am
a/
2.9cos(27)
b/
increasing
2.9cos(27)
b/
increasing
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