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Can someone help me with these problems?

  • Thread starter thugg
  • Start date
9
0
i cant remember how to do this at all, but can someone just post a simple step by step solution for this? thanks

http://img275.imageshack.us/img275/2392/ss2mx.jpg [Broken]




also having trouble with this one



http://img374.imageshack.us/img374/1146/dfsd4mu.jpg [Broken]
 
Last edited by a moderator:

Answers and Replies

Fermat
Homework Helper
872
1
Q1: resolve T1 into horizontal and vertical components. Then equate all the horizontal forces and all the vertical forces.
 
Fermat
Homework Helper
872
1
Q2: let T1 be the tension in the angled rope/string and T2 be the tension in the horizontal rope/string. Use the same strategy as for Q1 to solve for T1 and T2. Hence get coefft of friction
 
9
0
hmm still kinda confused, any chance you could show me step by step how to solve it


like how do you resolve T1 and T2 to get values.....like i know the 20 has components of x = 0, and y = -20 right? but how do u get values with the 30 degree angle?
 
Last edited:
117
0
thugg said:
hmm still kinda confused, any chance you could show me step by step how to solve it


like how do you resolve T1 and T2 to get values.....like i know the 20 has components of x = 0, and y = -20 right? but how do u get values with the 30 degree angle?
draw out the angles and use trig.

T1+T2=(0,+20)

use the sin and cos function to resolve the two tensions into vectors. you should have 2 sets of equations to solve for T1 or T2, once you know one the other is only a matter of substitution.
 

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