Blocks shown in figure moves with constant velocity 10 ,m / s towards right. All surfaces in contact

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4-2.Friction

medium

Blocks shown in figure moves with constant velocity $10 \,m / s$ towards right. All surfaces in contact are rough. The friction force applied by ground on block $B$ is ........ $N$

A$0$

B$20$

C$10$

DInsufficient data

Solution

(b)
Given that:
velocity of blocks $=10\,ms ^{-1}$
Friction force between $B$ and $A=20\,N$.
As we know,
Force $=$ mass $\times$ acceloration
So, Friction force between the block $B$ and the ground is zero as acceleration of the blocks is zero as they are moving with constant velocity.

Standard 11

Physics

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hard

A box of mass $m\, kg$ is placed on the rear side of an open truck accelerating at $4\, m/s^2$. The coefficient of friction between the box and the surface below it is $0.4$. The net acceleration of the box with respect to the truck is zero. The value of $m$ is :- $[g = 10\,m/s^2]$

medium

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hard

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hard

(JEE MAIN-2021)

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normal

Blocks shown in figure moves with constant velocity $10 \,m / s$ towards right. All surfaces in contact are rough. The friction force applied by ground on block $B$ is ........ $N$

Solution

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