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A disk like reel with a mass-less thread unrolls while falling vertically downwards. The acceleration of its free fall is?? If there is no mass in the thread how will acceleration take place???

A disk like reel with a mass-less thread unrolls while falling vertically downwards. The acceleration of its free fall is??
 If there is no mass in the thread how will acceleration take place???
 

Grade:12

1 Answers

Saurabh Kumar
askIITians Faculty 2411 Points
6 years ago
If mass of disc(cylinder like reel) is considered only. then
Torque equation, calculate torque due to tension about the centre, T X R = I x angular acceleration
Force equation, mg – T = M a
Calculate, and find the acceleration..

IF>> mass of the string is given and as it is decreasing, then concept would be something different....

Good Luck

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