Q.

A brick of mass 2kg just begins to slide down on inclined plane at an angle of 45º with the horizontal. The force of friction will be

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a

19.6 sin 45º

b

9.8 sin 45º

c

19.6 cos 45º

d

9.8 cos 45º

answer is A.

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Detailed Solution

f = mg sinθ
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A brick of mass 2kg just begins to slide down on inclined plane at an angle of 45º with the horizontal. The force of friction will be