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

Question

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 (A)  2N,3N  (B)  5N,6N  (C)  10N,15N  (D)  20N,30N

Tardigrade Admin · Accepted Answer

Frictional force, f=28.2 cos 45o =28.2(1/√2)=20 N Normal reaction, R=50-28.2 text sin 45o =50-20=30N

Q. 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

$2 N, 3 N$

$5 N, 6 N$

$10 N, 15 N$

$20 N, 30 N$

Frictional force,
$f = 28.2 cos 45^{o}$
$= 28.2 \frac{1}{2} = 20 N$
Normal reaction, $R = 50 - 28.2 s in 45^{o}$
$= 50 - 20 = 30 N$

Q. 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

2N,3N

5N,6N

10N,15N

20N,30N

Frictional force, f=28.2cos45o =28.22​1​=20N Normal reaction, R=50−28.2sin45o =50−20=30N

$2 N, 3 N$

$5 N, 6 N$

$10 N, 15 N$

$20 N, 30 N$

Frictional force,
$f = 28.2 cos 45^{o}$
$= 28.2 \frac{1}{2} = 20 N$
Normal reaction, $R = 50 - 28.2 s in 45^{o}$
$= 50 - 20 = 30 N$