Forces

[coligro]

I couldn't solve this problem. Could anybody help me with a solution process that I can comprehend your thinking.

Thank you.

 

 

 

[swansont]

What have you done so far?

 

Is there a net force on the 10 kg block?

[coligro]

I do understand number 8a). However how can I calculation the tension in a cord? Where do I find the variables and what equation do I have to take?

[swansont]

Where does the tension show up in the analysis?

[coligro]

I think I could solve it at my own.

 

a)

 

F_Res=F_G9kg-F_G6kg-F_F= 9,81 N

 

a=F_Res/25kg=0.3924 m*s^-1

 

b)

F_T= 9kg*9.81-9kg*0.3924m*s^-1= 85N

 

c)

F_T=6kg*9.81-6kg*(-0.3924m*s^-1)= 61N

 

 

Have I done everything correct?

[daniton]

what all the wired symbols,I can't understand.

let's try my way from , right to left I symbolize the tension and the mass as follows

m1 , t1 , m2 , t2 , m3

then follow me since the motion is to the right,

m1g - t1 = m1a .......(1)

t1 - t2 - ff = m2a ........(2)

t2 - m3g = m3g ........ (3)

solve this you will get what you need.