Answer to Question #81546 in Physics for afolabi

Question

A non uniform rod XY of mass 40kg and length 5.0m lies on the horizontal ground. Its center of gravity is 2.0m from the end X. Calculate the vertical force p, that will just be sufficient to lift the end y from the ground.

Answer 1

Taking the moments about the end X:
PL-mg(L-d)=0
P(5)-(40)(9.8)(5-2)=0
P=240 N.