Example 9-13

Example 9-13 - Example 9-13...

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Example 9-13 Two blocks are connected by a string that passes over a pulley of radius  R  and moment of inertia  I . The block of mass  m 1  slides on a frictionless, horizontal surface; the block of mass  m 2  is  suspended from the string ( Figure       9-29     ). Find the acceleration a of the blocks and the tensions  T and  T 2 . The string does not slip on the pulley. PICTURE  The tensions  T 1  and  T 2  are not equal because the pulley has mass and because there  is static friction between the string and the pulley ( Figure       9-29     ). (If the two tensions were equal,  the torque on the pulley by the string would be zero.) Note that  T 2  exerts a clockwise torque and  1  exerts a counterclockwise torque on the pulley. Use Newton’s second law for each block, and  Newton’s second law for rotational motion for the pulley. Relate 
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