Blocks of mass m_1 and m_2 are connected by a massless string that passes over the frictionless pulley in the figure. Mass m_1 slides on a horizontal frictionless surface. Mass m_2 is released while the blocks are at rest.(adsbygoogle = window.adsbygoogle || []).push({});

http://s93755476.onlinehome.us/stuff/knight.Figure.13.68.jpg [Broken]

i know the acceleration of the masses is m_2*g/(m_1+m_2)

i need to find:

A. the tension of the string

B. supposing the pulley has mass m_p and radius R. Find the acceleration of m_1 and the tensions in the upper and lower portions of the string.

C. find the tension in the upper portion of the string.

D. find the tension in the lower portion of the string.

i know T_1 (upper portion of string) is T_1 = m_1*a

T_2(lower portion) is T_2 - m_2*g = m_2*a

torque = T_2*R - T_1*R = I*alpha

i still don't know how to solve for the tension of the string since there are two different tensions on the string depending on the pulley. i tried adding the two tensions but that didn't work. im not really sure how to incorporate mass of the pulley. any help is appreciated.

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# Homework Help: Pully with mass

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