Monday
March 30, 2015

Homework Help: Physics-repost, sorry, I still don't understand :(

Posted by Sukie on Sunday, March 1, 2009 at 6:52pm.

A forearm with a mass of 1.2kg supports a ball with a mass of 5.44 kg. The forearm is 0.050m long; it's perpendicular to the arm is 0.35m long, the center of gravity is at 0.15m from the elbow. Find the force exerted by rhe biceps and the force on the elbow joint.

I know this is just like any other problem with center of gravity and trying to find the forces on both ends supporting the ball, but there's only one support, the elbow, so that would be the fulcrum and even then, what does the forearm length have to do with it? I don't know how to set up the equation.

Sorry to post again, I think Damon tried to explain this to me in an earlier post, but after spending time trying to figure this out, i still don't get it.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - one last time - A forearm with a mass of 1.2kg supports a put with a ...
Physics - A forearm with a mass of 1.2kg supports a ball with a mass of 5.44 kg...
PHYSICS - A man holds a 178N ball in his hand, with the forearm horizontal. He ...
physics - A man holds a 194-N ball in his hand, with the forearm horizontal (see...
physics - A man holds a 185-N ball in his hand, with the forearm horizontal (...
physics - The total cross-sectional area of the load-bearing calcified portion ...
physics-please help! - The total cross-sectional area of the load-bearing ...
Physics Classical Mechanics - You are holding a ball of mass m2 in your hand. In...
Physics - Consider holding a carton of milk in your hand. The force of the bicep...
physics - In an isometric exercise a person places a hand on a scale and pushes ...

Members