Given: A block with mass m1 = 8.6 kg is on an incline with an angle ? = 26.0° with respect to the horizontal.
Question: A new block is attached to the first block. The new block is made of a different material and has a coefficient of static friction ? = 0.73. (When there is no friction the acceleration of the first block is 4.29 m/s2)
What minimum mass is needed to keep the system from accelerating?