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Physics - NLM Question with Solution | TestHub

PhysicsNLMFrictionHard2 minQB

PhysicsHardsingle choice

String is massless and pulley is smooth in the adjoining figure. Total mass on left hand side of the pulley is $m_{1}$ and on right hand side is $m_{2}$ . Friction coefficient between block B and the wedge is $μ = \frac{1}{2}$ and $θ = 3 0^{\circ}$ . Select the wrong option

Options:

Answer:

Solution:

Let acceleration of system be a Block B will be remain at rest if

$m (g + a) sin θ \leq μ m (g + a) cos θ$

$\Rightarrow μ \geq tan θ \Rightarrow μ \geq tan 3 0^{\circ} \Rightarrow μ \geq \frac{1}{3}$

But $μ = \frac{1}{2}$ which is smaller than $\frac{1}{3}$

Stream:JEESubject:PhysicsTopic:NLMSubtopic:Friction

⏱ 2mℹ️ Source: QB

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