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Standard XII

Physics

Limiting Friction

Two block A...

Question

Two block $A$ and $B$ are arranged as shown in the figure. The mass of block $A$ is $10$ $k g$ . The coefficient of friction between the block $A$ and the horizontal plane is $0.2$ . The minimum mass of block $B$ to start motion will be

0.2

k g

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10

k g

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5

k g

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2

k g

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Solution

The correct option is D $2$ $k g$
$m_{A} = 10$ $k g$
$W_{A} = 10$ $g = 100$ $N$
$N = W_{A} = 100$ $N$
$f = μ N = 0.2 \times 100 = 20$ $N$
$T = M_{B} g = f$
$\Rightarrow M_{B} = \frac{f}{g} = 2$ $k g$

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Two block A and B are arranged as shown in the figure. The mass of block A is 10 kg. The coefficient of friction between the block A and the horizontal plane is 0.2. The minimum mass of block B to start motion will be

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Two block $A$ and $B$ are arranged as shown in the figure. The mass of block $A$ is $10$ $k g$ . The coefficient of friction between the block $A$ and the horizontal plane is $0.2$ . The minimum mass of block $B$ to start motion will be

The correct option is D $2$ $k g$
$m_{A} = 10$ $k g$
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