Recent content by pprajwal

Yes but the force that causes the external force is your push. Ultimately, the source is you pushing right?

I do not understand the point of Earth not being a point mass. I mean, how does a point mass and Earth differ in action of gravity (wrt the question). And, by saying that Earth's potential is finite, do you mean that for every baby born, the gravitational force on me decreases by infinitely...

What would you say about zorbing on level ground? You don't have a slope there for the ball to roll down due to gravity. And, the ground pushes you forward due to the force you apply inside the ball. Doesn't that imply that you are causing the motion thereby changing the position of CG? And...

In nature, all forces have a limited value, i.e, their effect is reduced if many objects are influenced by that force. Example, the magnetic force experienced by a single iron nail (in a magnetic field) is greater than that of 2 iron nails in the same field. Consider gravity, gravity exerts...

My high school teacher told me that internal forces of a system do not change the Centre of Gravity of a system. I have doubt regarding this. If internal force is applied to the wall of a system, the CG must change right? If not, where'll be the result of applied force. I have some examples...