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A body of weight 50 N placed on a horizo...


A body of weight 50 N placed on a horizontal surface is just moved by a force of 28.2 N. the frictional force and the normal reaction are

A

2 N,3 N

B

5 N, 6 N

C

10 N,15 N

D

20 N,30 N

Text Solution

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The correct Answer is:
D
(d) Frictional force,`f=28.2 cos 45^(@)`
`=28.2 xx(1)/(sqrt(2))=20N`

Normal reaction, R=50-`28.2 sin 45^(@)=50-20=30N`
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