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Physics - Rotation Question with Solution | TestHub

PhysicsRotationTorque / angular accelerationEasy2 minPYQ_2022

PhysicsEasysingle choice

A door 1.2 mwide requires a force of $1 N$ to be applied perpendicular at the free end to open or close it. The perpendicular force required at a point 0.2 mdistant from the hinges for opening or closing the door is

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Answer:

Solution:

$τ$ torque required to open/close the door will remain constant. $τ = r_{1} \times F_{1} = r_{2} \times F_{2} 1.2 \times 1 = 0.2 \times F_{2} \Rightarrow F_{2} = 6 N$

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

⏱ 2mℹ️ Source: PYQ_2022

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