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4. A box sits on an inclined plane without sliding. As the angle of inclination increases,...

4. A box sits on an inclined plane without sliding. As the angle of inclination increases, thenormal force
(a) decreases(b) increases(c) does not change(d) is directed upward

please explain why.

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Answer #1

MgSin =

As increases, Sin increases, For equation to hold true, N decreases,   <90

MgCos = N

Similarly As increases , Cos decreases, N decreases   <90

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