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Physics - Rotation Question with Solution | TestHub

PhysicsRotationTorque / angular accelerationEasy2 minPYQ_2020

PhysicsEasysingle choice

A door $1.6 m$ wide requires a minimum force of $1 N$ to be applied at the free end to open or close it. The minimum force that is required at a point $0.4 m$ away from the hinges for opening or closing the door is

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Answer:

Solution:

It is given in the question, torque $τ = 1.6 \times 1 = 1.6 N m$

So, when $d = 0 .4 m$ ,

$F = \frac{τ}{d} = \frac{1.6}{0.4} = 4 N$ .

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:RotationSubtopic:Torque / angular acceleration

⏱ 2mℹ️ Source: PYQ_2020

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