# Physics tension help

1. Jun 8, 2013

### katiegerster

1. The problem statement, all variables and given/known data

2. A mass M=169 kg is suspended from the end of a uniform boom.The boom (mass=90.0 kg, length=3.60 m) is at an angle θ=68.0 deg from the vertical, and is supported at its mid-point by a horizontal cable and by a pivot at its base. Calculate the tension in the horizontal cable.

2. Relevant equations

T=mg
T=ma

3. The attempt at a solution

i am not sure how to solve for tension when given an angle. i know i need to use sin(68) somewhere in the problem i am just confused as to where

2. Jun 8, 2013

### voko

This is again a static equilibrium problem. You need a review, I am afraid.

3. Jun 8, 2013

### haruspex

Can you draw the diagram confidently, showing all the forces? What are all the forces (magnitude, direction, line of action - use symbols for unknowns as necessary)? Do you know how to resolve a force at an angle into X and Y components? Can you then write the various force and torque equilibrium equations?