- #1

Rijad Hadzic

- 321

- 20

## Homework Statement

At one point during its swing, a wrecking ball exerts a tension force of 9800 N on its cable, which makes an angle of 30 degrees with the horizontal. The crane's 9 m long boom is at an angle of 55 degrees with the horizontal. What is the torque exerted by the wrecking ball on the crane about an axis perpendicular to the page and passing through the point P shown in picture

here is a pic of the problem:

http://imgur.com/a/c4B0X

## Homework Equations

Torque = r * applied force

## The Attempt at a Solution

Well.. I have some questions first with this one.

Am I finding the torque at the point the cable meets the crane, or at point P? I guess I really don't know much about cranes at all I am not sure how they work so this adds to the confusion..

Also how am I suppose to find the length of the cable??