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Two 100 kg boxes are dragged along a frictionless surface with a constant acceleration of 0.6 m/s2, as shown below. Each rope has a mass of 1 kg. Find the force F and the tension in the ropes at points A, B, and C.

F = N

TA = N

TB = N

TC = N

What I have done:

Equations:

Weight = M * G

Force = M * A

The weight for each box is 981N.

The force of gravity is offset by the normal force because it is on a surface, and there is no friction force.

Can I say that the force of Tension A is = the weight of the first box which is 981N?

And since Tension A and B are attached, Tension B = Tension A?

Since there is a force pulling at C to accelerate the 2 boxes can I say

Tension C = F?

F = M * A

Force of Tension A, B, C = 202kg * 0.6m/s^2

Force of Tension C + 1962N = 121 kg m/s^2

Then I would get a negative force for Tension C which is the Force...

Can someone point out what I did wrong?

Thanks so much!

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# Homework Help: Tenison/Force Problem

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