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Q.

Normal reaction N is a force exerted by the surface on the block perpendicular to the surface of contact. A block of mass 1 kg is placed on inclined plane of inclination 370 as shown in the figure.  Find the component of normal reaction N = 8 N on the block x-axis and y-axis.

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a

10 N, 0 N

b

4.8 N, 6.4 N

c

6.4 N, 4.8 N

d

-4.8 N, 6.4 N

answer is A.

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Detailed Solution

The x-component of normal reaction N is

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- N cos 530 = -8×35 = -4.8 N

The y-component of normal reaction N is N sin 530

= 8×45 = 325 = 6.4 N

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