Answer to Question #191608 in Physics for Amy

Question

A pulley (in the form of a uniform solid disk) with mass M_p and radius R is attached to the ceiling and rotates with no friction about its pivot. Mass M₂ is bigger than mass m₁, and they are connected by a massless inextensible cord. T₁, T₂, and T₃ are the magnitudes of the tensions in the cords, as shown. The cord does not slip on the pulley.

The picture is: https://docs.google.com/document/d/1aXVco5fRWXRQCE_fm96jQrM0tgHOi2snxzRHdqYBIf4/edit?usp=sharing

Which statement is true about the center of mass of the system of the pulley, and m₁ and M₂?

• I put "The center of mass doesn’t accelerate" and I got it wrong.

What is the relationship between T₃ and the masses?

• I put "T3 = (m1 + M2 +Mp) g" and I got it wrong.

Answer 1

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