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Physics - NLM Question with Solution | TestHub

PhysicsNLMSimple Application of NLMMedium2 minQB

PhysicsMediuminteger

In the arrangement shown in the figure, the pulleys are all massless. The load has a mass of 21 kg. The point P is moved by a distance of 2.5 cm. Find the minimum work (in J) required to be done by the force.

Answer:

Solution:

For the load hanging from the pulley cascade: $4 T + 2 T + T = 21 g \Rightarrow 7 T = 210 \Rightarrow T = 30$ N

The force at point P: $F = 8 T = 240$ N

Work done: $W = F \cdot S = 240 \times \frac{2.5}{100}$

$W = 6$ J

Subject:PhysicsTopic:NLMSubtopic:Simple Application of NLM

⏱ 2mℹ️ Source: QB

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