How Does Friction Affect Acceleration and Tension in a 3-Block Pulley System?

AI Thread Summary
The discussion focuses on a physics problem involving a three-block pulley system with a coefficient of kinetic friction of 0.100 between the middle block and the table. Participants are tasked with calculating the acceleration of the three objects and the tension in the strings connecting them. The masses of the objects are given as m1 = 10.0 kg and m2 = 80.0 kg. The thread also includes a user expressing confusion about posting and seeking to remove their message. Overall, the conversation centers on applying physics equations to solve for acceleration and tension in the system.
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1. The drawing shows three objects. They are connected by strings that pass over massless and friction free pulleys. The objects move, and the coefficient of kinetic friction between the middle object and the surface of the table is 0.100
(a) What is the Acceleration of the three objects? (b) Find the tension in each of the two strings.

http://i4.photobucket.com/albums/y111/kathy_felldown/sb-pic0550.png"

m1 = 10.0kg m2 = 80.0kg




Homework Equations





The Attempt at a Solution

 
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What is your attempt to solution?
 
I didn't mean to post this(didn't know it even got posted). I am not sure how to remove it.
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...

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