A person of mass 75 kg is standing on the tiptoes of both feet. The heel is lifted just above the ground, so the foot can be treated as horizontal. There are three forces acting on each foot; the upward vertical force N exerted by the floor on the toes, the downward vertical force F sub 2 exerted by the leg bone (tibia) on the ankle (talus), and the upward vertical force F sub 3 exerted by the Achilles tendon on the heel. The distance from the toes to the ankle is 12.5 cm, and the distance from the ankle to the heel is 6.5 cm.
(a) Draw a free-body force diagram for the foot, showing the relevant forces and distances.
(b) Applying the conditions of force equilibrium, find the magnitudes of F sub 2 and F sub 3.
2006-07-15 00:51:37 · 5 answers · asked by Mary Eda 2 in Science & Mathematics ➔ Physics
Well, I used to know how to do that, but it's been quite a while since I took Statics in college. Even if I did remember, though, how would I draw it here? :-)
I could try...
|
________,/---'_________
That's not working. Sorry! But thanks for taking me back a few years... and good luck.
2006-07-15 18:48:38 · answer #1 · answered by Question Mark 4 · 1⤊ 0⤋
I. each merchandise in a state of uniform action has a tendency to proceed to be in that state of action except an exterior rigidity is utilized to it. Ex: You roll a ball. It slows down by friction. II. Acceleration is produced at the same time as a rigidity acts on a mass. The more desirable the mass (of the object being sped up) the more desirable the quantity of rigidity mandatory (to boost up the object). Ex: you are able to't kick a brick wall down, yet you are able to kick a football ball because the brick wall is extra tremendous. III. for each action there is an equivalent and opposite re-action. Ex:at the same time as a rocket lifts off, the rocket's action is to push down on the floor with the rigidity of its engines, and the reaction is that the floor pushes the rocket upwards with an equivalent rigidity.
2016-11-06 09:57:20 · answer #2 · answered by ? 4 · 0⤊ 0⤋
Hey try this number 1-800-525-physicq
this is the number fur einstein in heaven and he may be able to help u with that
cuz i don't think that there is a person on earth who can
2006-07-15 01:18:22 · answer #3 · answered by Gabriel 3 · 0⤊ 0⤋
"The heel is lifted just above the ground, so the foot can be treated "
When the heel is lifted above the ground how can you treat the foot to be horizontal
2006-07-15 00:57:37 · answer #4 · answered by NANDU 1 · 0⤊ 0⤋
shut up
2006-07-15 00:53:38 · answer #5 · answered by Anonymous · 1⤊ 0⤋