# Help! No idea whatsoever!

• Mar 29th 2009, 02:29 PM
chckn440
Help! No idea whatsoever!
If a person weighs 200 lbs and the calf muscle is inserted a distance 2 times greater than the distance of the center of gravity of the body from the fulcrum, to lift the body, the calf muscle will need a force (in lbs) equal to ________________ lbs.

A) 400
B) 200
C) 100
D) 50
E) 0.5
• Mar 29th 2009, 02:38 PM
skeeter
Quote:

Originally Posted by chckn440
If a person weighs 200 lbs and the calf muscle is inserted a distance 2 times greater than the distance of the center of gravity of the body from the fulcrum, to lift the body, the calf muscle will need a force (in lbs) equal to ________________ lbs.

A) 400
B) 200
C) 100
D) 50
E) 0.5

class 1 lever ...
http://www.edinformatics.com/math_sc...rPrinciple.png

$\displaystyle F_1 \cdot D_1 = F_2 \cdot D_2$
• Mar 29th 2009, 04:10 PM
chckn440
Thanks for the response. Pardon my stupidity, but im still not sure how to answer the problem, so a solution solved up to the problem's end would be appreciated.