You are warming up for a workout by stretching your arms out horizontally. One of your arms has a mass of 10 k

Question

You are warming up for a workout by stretching your arms out horizontally. One of your arms has a mass of 10 kg and its weight produces a torque of 30 N⋅m about your shoulder joint. What is the effective lever arm (distance from shoulder joint to the arm’s centre of gravity) of your arm?

Answer 1

sore arms ??

Answer 2

This is not a physiology question, it is a simple physics question. Paymanns is correct that the force due to gravity on a 10k object is 98 Newtons. If the torque on the object is given as 30 Newton-meters, which it is, the distance from the fulcrum to the center of gravity is 30/98, as paymanns says.

Of course, SAMI is totally wrong about living limbs not having a center of gravity (center of mass, actually, because an object need not be in a gravitational field to have such a center). Even SAMI's tiny brain has a center of mass, if you can find it (the brain, that is).

Answer 3

F=M*g=10*9.8=98 N
T=F*d=>d=30/98=0.31m
d=31 cm

Answer 4

The tone of shoulder muscles,the pressure of blood acting on a working limb,the friction in joints like elbow and wrist and the rotation of forearm are all forces acting about the shoulder joint. No center of gravity exists for a living limb. And a dead limb does not warm up.

Answer 5

Sorry cant answer that but i just go straight in their day after day working the weights and right now im pushing 60 kilo


(by the way im a woman)

Answer 6

0.3m

Answer 7

huh!! dunno dude