Solving the Kinetic Friction and Tension of Two Blocks

AI Thread Summary
To solve for the coefficient of kinetic friction and the tension in the rope connecting two blocks, a free body diagram is essential to visualize the forces acting on each block. The problem states that the blocks are moving at a constant velocity, indicating that the acceleration is zero. This means that the net forces acting on the blocks must balance out. The equations of motion should incorporate the gravitational force, normal force, friction, and tension to find the required values. Properly accounting for all forces will lead to the correct calculations for both the coefficient of kinetic friction and the tension in the rope.
mooney82
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Homework Statement


Block A (M1-5 kg) is on a horizontal surface and block B (M2-2 kg)to the left resting on a 30 degree incline. the two are connected to each other by a mass-less rope over a massless pulley and are moving down hill (to the left) at constant velocity.

a) Find the coefficient of kinetic friction assuming it is the same for both blocks.
b) The tension of the rope


Homework Equations


fk=ukN


The Attempt at a Solution


I found -fk=M1*a and substituted that into the first equation of 5sin(30)-fk=ma. I'm not sure if I'm even starting this right or not, a gentle nudge in the right direction would be most appreciated.
 
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mooney82 said:

The Attempt at a Solution


I found -fk=M1*a ...

You are omitting one of the forces acting on the mass. Did you draw a free body diagram ?

Another hint: from reading the problem statement, we know that a=____?
 
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