1 vote

Can't Newton's Third Law be proved from the other two?

Your argument works through one case where you can demonstrate that the forces must be equal. Newton's law states that all cases must satisfy this property. Consider a case where the objects do not ...
Cort Ammon's user avatar
  • 48.5k
1 vote

Where do exerted forces come from?

I think my confusion stems from this: if a book is resting on a table I understand that the force of gravity acts on the book and as it is in equilibrium, the table exerts a force equal in magnitude ...
Bob D's user avatar
  • 71.7k
1 vote

Where do exerted forces come from?

Electrostatic sounds good. The table (wall) has atomic orbitals on its surface atoms, as does the book (car). So when they come in contact, the electrons are now trying to occupy the same space. Now I ...
JEB's user avatar
  • 33.6k
1 vote

Pushing off another object — why does the other object do work on you without expending any energy?

I finally understand how to think about my question in a way that I can put into my own words. I will address the last part of my OP, which said, There is also work done by the object on you, but the ...
Maximal Ideal's user avatar
1 vote

Why is the force of gravity not equal to the normal force on an inclined plane?

Turn the question on its head. Ask yourself: Why would you expect the normal force to be equal to the gravitational force? There is no law stating this. There is no reason to thing that this should be ...
Steeven's user avatar
  • 50.9k
1 vote

How does tilting a bike make it turn sharper?

I will start with the simplified version of why a bike follows a tighter turn when leaned. In the diagram above using a (very) simplified bike model consisting of two connected wheels, the un-leaned ...
KDP's user avatar
  • 3,297

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