so there's a wheel with radius R and mass M. there's also a hub attached to the wheel's center with radius r and mass m. there's also a mass X suspended from a massless string that's wound around the hub. if the axle has negligible radius and mass and both wheel and the hub are solid with uniform density, how would you find the acceleration of the suspended mass after its released?(adsbygoogle = window.adsbygoogle || []).push({});

i thought what it was askng for was the tangential acceleration, which i found to be equal to (F*r^2)/I.... (since tan acc is r*alpha where alpha is r*F/I because torque = I*alpha and also r*F)... so i tried doing:

[r^2*X*g]/0.5[M*R+m*r]

but that doesn't work and i'm not sure what im doing wrong... can someone point me in the right direction?

thanks!

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# Homework Help: Rotational kinematics - acceleration

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