Multiple Pulley/Friction system

  • Thread starter Thread starter frostmephit
  • Start date Start date
  • Tags Tags
    Multiple System
AI Thread Summary
The discussion revolves around solving a physics problem involving a multiple pulley and friction system. The key points include determining the acceleration of two blocks and the tension in the strings under two scenarios: one with frictionless surfaces and another with a coefficient of kinetic friction of 0.30 between the blocks and the table. The user expresses confusion regarding the calculations for tension and friction, indicating a need for clarity on applying the equations of motion and friction. The relevant equations provided include F = ma and the formulas for frictional force. The conversation highlights the importance of understanding how friction affects the overall dynamics of the system.
frostmephit
Messages
2
Reaction score
0
Multiple Pulley/Friction system Please Help!

Homework Statement


In the given figure, the coefficient of kinetic friction between the two blocks shown is 0.30

a) Assume that the surface of the table and the pulleys are frictionless. Determine the acceleration of each block and the tension in the strings.

b) If the coefficient of kinetic friction between the table and the bottom block is now also 0.30, determine the acceleration of each block and the tension in the strings.


Homework Equations


F = ma
Ffr = FN(\muk)
FN = mg

The Attempt at a Solution


ƩFx = Ft1 + (\muk)(g)(m1m2)
I'm stuck. I know that the calculations of the tension are dependent on the friction, but I'm not quite sure how to calculate the friction and tension.
 

Attachments

Physics news on Phys.org


Does this help?
 

Attachments

  • blocks085.jpg
    blocks085.jpg
    26.2 KB · Views: 2,134
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...

Similar threads

Replies
3
Views
2K
Replies
10
Views
5K
Replies
4
Views
3K
Replies
22
Views
3K
Replies
10
Views
2K
Replies
3
Views
2K
Back
Top