A box with a mass M=15.0 kg is tied to a string and then hung over a

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Question:

A box with a mass M=15.0 kg is tied to a string and then hung over a massless pulley that does not add any friction to the system. A second box m=10.0 kg is tied to the other end and placed on a table. There is no friction between the box and the table. A force T=75.0 N is applied horizontally to the top box as indicated in the diagram.

A. What is the acceleration of the system?

B. What is the tension on the rope connecting the two boxes.

C. If the boxes start from rest, what is the velocity of the system after 3.00 s?

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