**Is Damocles Safe?**

Below is the story of the Damocles and a model of his dire situation. Use your understanding of statics to ask for questions/quantities that will help you estimate whether or not Damocles is safe. Put your questions in the comments. Answers are due the last day of class in your notebooks.

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Pingback: Homework 13 (7/16/2013) | Engineering for Community

How could vectors be incorporated?

Requested Info:

ropes: 1/4 inch yellow polypropylene rope with a tensile strength of 5.5kN

boulder: 1 ton with a diameter of 1 foot and 8 inches

length of ropes: (can be determined using proportionality. Use the picture and remember that the diameter of the boulder is 1 foot and 8 inches)

The person, knots and wire can hold 10,000 pounds

The person can bench press twice his body weight (wow!)

Distance between person and boulder (can be determined using proportionality. Use the picture and remember that the diameter of the boulder is 1 foot and 8 inches)

It is all about vectors: http://www.mathsisfun.com/algebra/vectors.html Learn how to add vectors!

Pingback: Homework 14 – June 18, 2013 | Engineering for Community

The downward force of the weight: Weight is the force due to gravity. Since the gravitational force (weight) is between the rock and the earth, the force the rock experiences is towards the earth. The short answer is 1 ton (convert to Newtons, perhaps?)