How to find the normal force given the center of gravity and the radius

[Pinkchika88]

Homework Statement

a person is doing pushups and its weight is 584 N, center of gravity is at waist and from waist to hands=.410m and from waist to feet=.840m. find the normal force on each hand and each foot

Homework Equations

The Attempt at a Solution

do u have to find the weight on top half of body and then weight on lower half (the force being applied by the hands/feet)?

 

[Andrew Mason]

Homework Statement

a person is doing pushups and its weight is 584 N, center of gravity is at waist and from waist to hands=.410m and from waist to feet=.840m. find the normal force on each hand and each foot

This is a torque problem. Analyse the torques about the fulcrum. Where is the fulcrum? What kind of a lever is this? Find the normal force at the top (or bottom) of a push- up - ie. ignore any angular acceleration. Also, assume there are no differences between left and right hands and between left and right feet.

AM