Given in figure are two blocks A and B of weight 20, N and 100, N , respectively. These are being pr

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4-2.Friction

medium

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 $F$ such that the system does not slide 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 ........ $N$

A$120$

B$150$

C$100$

D$80$

Solution

Various forces acting on the system are shown in the figure. For vertical equilibrium of the system,
$\mathrm{f}_{\mathrm{B}}=100 \mathrm{N}+20 \mathrm{N}=120 \mathrm{N}$
i.e., frictional force applied by the wall on the block $B$ is $120 N$

Standard 11

Physics

Imagine $a$ situation in which the horizontal surface of block $M_0$ is smooth and its vertical surface is rough with $a$ coefficient of friction $\mu$ Consider a special situation in which both the faces of the block $M_0$ are smooth, as shown in adjoining figure. Mark out the correct statement $(s)$

hard

On the horizontal surface of a truck a block of mass $1 \;kg$ is placed $(\mu=0.6)$ and truck is moving with acceleration $5\; m / sec ^2$ then the frictional force on the block will be

medium

(AIPMT-2001)

$A$ block of mass $M$ is placed on $a$ horizontal surface and it is tied with an inextensible string to $a$ block of mass, as shown in figure. A block of mass $m_0$ is also placed on $M$ The minimum value of $\mu$ between the block $M$ and $m_0$ (taking horizontal surface frictionless) for which all the three blocks move together, is

hard

If acceleration of $A$ is $2 \,m / s ^2$ which is smaller than acceleration of $B$ then the value of frictional force applied by $B$ on $A$ is ……… $N$

medium

If force $F$ is increasing with time and at $t = 0 , F = 0$ where will slipping first start?

normal

Solution

Similar Questions

On the horizontal surface of a truck a block of mass $1 \;kg$ is placed $(\mu=0.6)$ and truck is moving with acceleration $5\; m / sec ^2$ then the frictional force on the block will be

If acceleration of $A$ is $2 \,m / s ^2$ which is smaller than acceleration of $B$ then the value of frictional force applied by $B$ on $A$ is ……… $N$

If force $F$ is increasing with time and at $t = 0 , F = 0$ where will slipping first start?

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