Gravity towards Center of Mass?

AI Thread Summary
Gravity does not always act from the center of mass for finite mass distributions, as this phenomenon is specific to spherical mass distributions. In non-spherical shapes, the gravitational force does not uniformly direct towards a single point. Instead, the gravitational field varies based on the distribution of mass. This means that the direction of gravitational attraction can differ depending on the object's shape. Understanding this distinction is crucial for accurately analyzing gravitational interactions in various contexts.
particlemania
Messages
21
Reaction score
0
Gravity towards Center of Mass??

Conceptual question:

Does gravity always act from the center of mass, regardless of shape of source of field, for finite mass distributions?
 
Physics news on Phys.org


No. The opposite is the case: Gravity appears to be toward the center of mass from all directions only in the case of a spherical mass distributions.
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top