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Physics - NLM Question with Solution | TestHub

PhysicsNLMSimple Application of NLMHard2 minPYQ_2020

PhysicsHardsingle choice

A block of mass m rests on a horizontal table with a co-efficient of static friction $μ .$ What minimum force must be applied on the block to drag it on the table?

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Answer:

Solution:

Hint:
$F sin θ + N = m g N = m g - F sin θ$ $F cos θ = μ (m g - F sin θ) F = \frac{μ m g}{c o s θ + μ s i n θ}$ , for $F_{m i n}, \frac{d}{d θ} [cos θ + μ sin θ] = 0$ $∴ tan θ = μ$ $∴ F_{m i n} = \frac{μ mg}{1 + μ ^{2}}$

Stream:WBJEESubject:PhysicsTopic:NLMSubtopic:Simple Application of NLM

⏱ 2mℹ️ Source: PYQ_2020

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