You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Physics

Com of Solid Bodies

Given in the ...

Question

Given in the figure are two blocks A and B of weight $20 N$ and $100 N$ , respectively. These are being pressed against a wall by a force $F$ as shown. If the coefficient of friction between the blocks is $0.1$ and between block B and the wall is $0.15$ , the frictional force applied by the wall on block B is

100 N

No worries! We‘ve got your back. Try BYJU‘S free classes today!

80 N

No worries! We‘ve got your back. Try BYJU‘S free classes today!

120 N

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

150 N

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $120 N$
As both the masses are in equilibrium, static friction will be acting on the blocks which can be found from balancing the forces in vertical direction.

Writing force balance in vertical direction for block A,
$f_{1} =$ weight of the block A $= 20 N$
Writing force balance in vertical direction for block B,
$f_{2} - f_{1} =$ weight of the block B $= 100 N$
From these equations, we get the value of $f_{2}$ (frictional force between the wall and block B) as $120 N$

Suggest Corrections

Similar questions

Q. Given in the figure are two blocks A and B of weight

20

N and

100

N, respectively. These are being pressed against a wall by a force

F

as shown. If the coefficient of friction between the blocks is

0.1

and between block B and the wall is

0.15

, the frictional force applied by the wall on block B is:

Q. Given in the figure are two blocks

A

and

B

of weight

20 N

and

100 N

respectively. These are being pressed against a wall by a force

F

as shown. If the coefficient of friction between the blocks is

0.1

and between block

B

and the wall is

0.15

, the frictional force applied by the wall on block

B

is:

Q. As given in the figure two blocks

A

B

of weight

20 N

and

100 N

respectively are in equilibrium. These are being pressed against a wall by force

F

as shown. If the coefficient of friction between the two blocks is

0.1

and between block

B

and the wall is

0.15

, the frictional force applied by wall on block

B

(f_{2})

and the frictional force applied by block

B

on block

A

(f_{1})

Given in the figure are two blocks A and B of weight 20 N and 100 N, respectively. These are being pressed against a wall by a force F as shown. If the coefficient of friction between the blocks is 0.1 and between block B and the wall is 0.15, the frictional force applied by the wall on block B is:

Q. In the figure given below, there are two blocks A and B of weight

20 N

and

100 N

respectively. These are being pressed against a wall by an external force

F

as shown in figure. If the coefficient of static friction between the blocks is

0.1

and between block B and the wall is

0.15

, then the frictional force applied by the wall on block B will be

Join BYJU'S Learning Program