Finding W1 & W2 Given Frictionless Pulley System

AI Thread Summary
In a frictionless pulley system at equilibrium, the weight W3 is given as 200N, and the goal is to determine the values of W1 and W2. The equations of motion are established using T1 and T2, leading to the equation T1sin50 + T2sin35 - W1 = 0. Participants note the need for an additional equation due to the presence of two unknowns, W1 and W2. There is confusion regarding the use of sine in the calculations, indicating a need for clarification on the approach. The discussion emphasizes the importance of correctly applying physics principles to solve for the unknown weights.
mrdoods
Messages
1
Reaction score
0
Last edited by a moderator:
Physics news on Phys.org
welcome to pf!

hi mrdoods! welcome to pf! :smile:

(try using the X2 icon just above the Reply box :wink:)
mrdoods said:
T1sin50+T2sin35-W1=0
T1(0.766)+T2(-0.422)-W1=0
?

(i think you have your 1 2 and 3 mixed up :redface:)

why are you using sin ? :confused:

and you have two unknowns, so won't you need another equation also? :wink:
 
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...
Back
Top