Oh! The question asks for the equation of the acceleration of the center of mass of the sphere. Doh. I can't believe i just spent the past hour trying to figure this out...
I just realized that if I solve for the X-axis equation i get the answer:
mgsinθ - f = ma
a = gsinθ - μgcosθ
But this is only true if the friction were kinetic. Also where does the rotational aceleration go?
Ok, I am trying to understand this problem on my practice exam and I can't figure out what I am doing wrong.
Homework Statement
A solid sphere of mass M and radius R is released from rest on an inclined plane with an angle of θ. The coefficient of static friction for the sphere on the plane...
Homework Statement
A man, of m = 70 kg, walks along a thin rigid plank, of M = 210 kg. The plank sits on the roof of a 10 story building and is placed so that its center of mass sits directly on the edge of the roof.
Where, along the plank, can the man move before the plank tips over the...