Wednesday
April 23, 2014

Homework Help: physics

Posted by Cassie on Sunday, November 25, 2012 at 10:42pm.

When you stand on your tiptoes, your feet pivot about your ankle. As shown in the figure, the forces on your foot are an upward force on your toes from the floor, a downward force on your ankle from the lower leg bone, and an upward force on the heel of your foot from your Achilles tendon. Suppose a 61 woman stands on tiptoes with the sole of her foot making a 25 angle with the floor. Assume that each foot supports half her weight.
Sorry I can't add a picture to this b/c cramster doesn't have my book but....
From the toe to the ankle pivot is 15cm and from the toe to the Achillies tendon it is 20cm.

a)What upward force does the Achilles tendon exert on the heel of her foot N?
b)The tension in the Achilles tendon will cause it to stretch. If the Achilles tendon is 15 long and has a cross-section area of 110 , by how much will it stretch under this force?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - Here’s how two different students approached part A. Elizabeth: Since ...
Physics - A 20-kg child sits on a see saw on the playground, 3.0 m from the ...
microsoft excell 2007 - helga needs to lay out her newly created pivot table....
math - john was building a new fence and he wnats it to stand 8 1/2feet above ...
physics - A meter stick is suspended vertically at a pivot point 27 cm from the ...
physics - You are standing 7 feet from one speaker and 13 feet from another. ...
physics - A triangular plate with a non-uniform areal density has a mass M=0.700...
math, trigonometric functions - a seesaw consists of a plank 4.5m long which is ...
physics class-Help!!! - A 3.0 m rod is pivoted about its left end.A force of 6.0...
Physics - The boom weighs 2450 and is attached to a friction less pivot at its ...

Search
Members