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patriots51
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Homework Statement
A rope of negligible mass passes over a pulley of negligible mass attached to the ceiling. One end is held by student A (70 kg) who is at rest. The other side has student b (60 kg).
I need to explain why or why not student b can lift student a off of the ground if he accelerates up the rope, increasing tension.
Homework Equations
the force of student A is 700 N (70kg x 10 m/s^2)
the force of student B is 600 N (60kg x 10m/s^2)
the normal force exerted on student A by the floor is 100N (?)
the force of tension will vary depending on student B's acceleration (F=ma)
The Attempt at a Solution
I don't believe that it would be possible to pull the person holding the rope up, but I'm not sure how to prove it.