Saturday

February 28, 2015

February 28, 2015

Posted by **Anonymous** on Saturday, July 27, 2013 at 12:09am.

a) What total force does the track surface exert on the sprinter? Assume his acceleration is parallel to the ground. Give your answer as a magnitude.

b) What total force does the track surface exert on the sprinter? Assume his acceleration is parallel to the ground, and give your answer as an angle with respect to the horizontal.

c) This force is applied to one foot (the other foot is in the air), which for a fraction of a second is stationary with respect to the track surface. Because the foot is stationary, the net force on it must be zero. Thus the force of the lower leg bone on the foot is equal but opposite to the force of the track on the foot. If the lower leg bone is 60 degrees from horizontal, what is the components of the leg’s force on the foot in the direction parallel to the leg? (Force components perpendicular to the leg can cause dislocation of the ankle joint.)

d) What is the components of the leg’s force on the foot in the direction perpendicular to the leg?

Can someone help me on this problem please? I tried googling it, and found I should use a^2 + b^2 = c^2 for A, but I'm so lost I don't even know what numbers I should be using to plug into that equation with.

- Physics -
**Elena**, Saturday, July 27, 2013 at 2:29pmYou can find the solution in

http://www.cabrillo.edu/~cfigueroa/11/11prob_sets/Solutions/11prob_sol_5%20.pdf

**Answer this Question**

**Related Questions**

Physics (College) - One simple model for a person running the 100 m dash is to ...

Physics - At the instant a race began, a 89.1 kg sprinter exerted a force of ...

physics - At the instant a race began, a 74.0 kg sprinter exerted a force of 850...

Physics - A sprinter accelerates at 4 m/s2 for 3 seconds, and then runs the rest...

Physics - A sprinter starts from rest in a 100-meter race, accelerates to his ...

science - A simple model for a person running a 100m race is to assume the ...

physics - A sprinter mass 72 kg runs the 50 meter dash in 8.35 s. Assume that ...

Connexus P.E - Harvey has his heart set on making the state finals for his track...

Physics - ok so I have a question At the instatn a race began, a 57-kg sprinter ...

physics - in a 100m race, 2 sprinters finish at the same time of 10.2 seconds, ...