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 normal reaction are:

2 N, 3 N

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5 N, 6 N

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10 N, 15 N

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20 N, 30 N

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Solution

The correct option is C $20 N, 30 N$
Frictional force $f = 28.2 cos 45^{o} = 28.2 \frac{1}{\sqrt{2}} = 20 N$
Normal reaction $R = 50 - 28.2 sin 45^{o} = 50 - 20 = 30 N$

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

The correct option is C 20N,30NFrictional force f=28.2cos45o=28.21√2=20NNormal reaction R=50−28.2sin45o=50−20=30N

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 normal reaction are:

The correct option is C $20 N, 30 N$
Frictional force $f = 28.2 cos 45^{o} = 28.2 \frac{1}{\sqrt{2}} = 20 N$
Normal reaction $R = 50 - 28.2 sin 45^{o} = 50 - 20 = 30 N$