physics

A frictionless massless pulley has 7 kg tied to a cable on the left side and an unknown mass (M) on the right. The unknown mass accelerates downward at 6.6 m/s2

What is the accelerationof the system/tension of the rope

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asked by Alex
  1. tension at the left side:
    T=7*6.6+7*g
    that has to be the tension on the right side also...
    T=M*g-M*6.6
    so M= 7(6.6+g)/(g-6.6)

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