El 22% Wed 5:59 PM a E Chrome File Edit View History Bookmarks People Window Hel

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El 22% Wed 5:59 PM a E Chrome File Edit View History Bookmarks People Window Help Assignment 7 Chapter 8 c Chegg Study I Guided so Upgrade to OS X El Capitan Not Now C b www.webassign.net/web/Student/Assignment-Responses/last?dep-12648095 Refine the experience and improve the performance of your Mac. Details App Book ks Hotmail h moodle york: My ho h YouTub Goog h Facebook h Online Banking Sig bet365 Online Do you want Google Chrome to save your password Never for this site Save password X Need Help? Read 4. C+0 -1 points Hawk PSE 1 P.059 My Notes Ask Your Teacher Use energy considerations to derive an expression for the angular acceleration of the pulley of moment of inertia I (and radius r) n the figure below. Assume that the friction between the pulley and its axle is negligible. Also assume that the friction between the masses and the surfaces is negligible. Use the following as necessary: g, m m2, I r, and 0.) a Need Help? Read 5. C+D -1 points Hawk PSE 1 P.075 My Notes C+ Ask Your Teacher

Explanation / Answer

let T1 and T2 be the tensions in the string connected to m1 and m2

T2 = m2*a

m1*g*sin(theta) - T1 = m1*a

net torque is T= (T1-T2)*r = I*alpha

alpha = (T1-T2)*r/I = (m1*g*sin(theta) - m1*a - m2*a)*r/I

I*alpha = m1*g*sin(theta) - (m1+m2)*r*alpha

alpha(I + (m1+m2)*r) = m1*g*sin(theta)

alpha = m1*g*sin(theta)/(I +(m1+m2)*r)

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