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High School/JEE/NEET/IPhO Physics | 17-19 Yrs

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How come both the tensions are equal?

6 years ago by Vamsi Krishna

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how net torque 2TR comes??????

7 years ago by anwesha singh

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Dear friend. Before finding torque we should know about which point/axes it is calculated about. here torque is taken about axes of cylinder i.e. make a diagram with cylinders circular face as front view in your paper. then u will und. 2 forces (T&T) are acting at a distance R from centre in upward direction. thus net Torque is 2TR. hope its clear

7 years ago by ashish N

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instead of 2tr should it be 0?? because one T is producing clockwise other anticlockwise so tr-tr=0?/

7 years ago by Aditi Gupta

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7 years ago by ashish N

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sir here we didnt took torque of mg beacause it was not involve in rotional motion of the cylinder.... that is the only reason or some else reason is there

7 years ago by Raj Sancheti

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Yes as mg is not rotating the cylinder, we have not considered it...

7 years ago by Physics Galaxy

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if distance b/w line of force (mg here) and axes of torque(cylinders axis here) is 0 then torque of the force about the axis is 0.

7 years ago by ashish N

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Video Lectures

High School/JEE/NEET/IPhO Physics | 17-19 Yrs

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