How to calculate tension in a rope?

  • #1

Homework Statement


The link to the problem is here, sorry I couldn't put the diagram in so thought it was better to link!
I need help with both questions, the attempt is for the first question.
https://www.dropbox.com/s/2stb476hp738w9l/Physics question.jpg

Many thanks for any help!

Homework Equations


Moments clockwise=Moments anticlockwise
F=ma


The Attempt at a Solution


Moments clockwise=Moments anticlockwise
5*15=TD
75=TD
...?
Not sure first bit is right tho!
 

Answers and Replies

  • #2
SteamKing
Staff Emeritus
Science Advisor
Homework Helper
12,796
1,668
In all of these problems, do the standard analysis:

1. Draw a free-body diagram and indicate all known forces and moments applied.
2. Write equations of equilibrium.
3. Solve the equations of equilibrium for the unknown forces and reactions.
 

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