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PhysicsBowl 2019 Q22

  • Writer: keshprad
    keshprad
  • Mar 29, 2020
  • 1 min read

22) For this question, we want to find the acceleration of the mass m[2]. The two masses are hung from opposite sides of the pulley. We are also told that we can ignore the friction and mass of the pulley.


We can start by using a free-body diagram for the two blocks.

Where m is mass, g is acceleration due to gravity, and T is tension force

Since m[2] and m[1] are connected by a string, both of the blocks should have the same acceleration. Knowing this, we can set up a system of two equations and solve for acceleration.

Where m is mass, g is acceleration due to gravity, a[net] is net acceleration, and T is tension force

Answer: C

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