Hour Exam II

Inclass Group Problem

You remember from your physics class that the average person's center of gravity is at approximately 56% of the person's height measured from the soles of their feet. Outline a procedure that you could follow that would let you measure John's actual center of gravity.

Using your assumptions, estimations and the procedure outline on page 1, find the approximate force on John's hip. You know that forces over 4000 N on the bony area of the hip can fracture it. Should you send John to the larger hospital for X-rays?

You check into some of your reference books and find that in general, forces of over 4000 N on the bony area of the hip may be sufficient to fracture the hip. Do you send Mr. Jacobs to the hospital for X-rays?

There is more than one way to solve this problem, using different physical principles. In your own words, describe how you would proceed to solve this problem using other methods.

Using your procedure above, find the force of the floor on the hip.

"http://www.udel.edu/pbl/curric/hip2.html" Last updated Nov. 22, 1996. Copyright Barbara Duch, Univ. of Delaware, 1996.