# Physics 10-26-10 Newton’s Laws and Equilibrium

PHYSICS: So an object at rest can be at equilibrium, but what about an object that is moving? And how does equilibrium relate to Newton’s first law? Or Newton’s second law? And what if you don’t have balanced forces. Here’s the lecture from Tuesday on just that! Now remind me, net forces produce what?

## 20 thoughts on “Physics 10-26-10 Newton’s Laws and Equilibrium”

• no shelby, i dont think so. the force on the egg is only as stong as the sheet so it couldnt have broken.

1. yeah, the egg would not have brken on the sheet but the sheet wouldn’t have cradled it so it would break when it hit the ground lol. Oh, and can someone explain the mountain climber problem, still don’t understand that

2. the egg thing Ms. Skinner mentioned something about time that the force is delivered in (which she later said I shouldn’t have started on that) but that might cause the egg to break. But with physics you never know, mabye the sheet would have simply gone back slightly and launched the egg back at Ms. Skinner

• I agree with Manasi! The way he uses the different visuals really helps me remember things better.

3. SO if an object is at equilibrium, does that mean there are no forces acting against it?

4. So an action-reaction pair can have a 0 net force, but each object can have a nonzero and therefore be in motion?

5. “This most beautiful system [The Universe] could only proceed from the dominion of an intelligent and powerful Being.”
-Isaac Newton

6. well since there is no video up and i like to do my web post early in the week so i do not forget i will comment on this old vid.

???Cold welding??? what is cold welding?

and meu is a ratio of what???

7. Is the force that the ground pushes back on an object at rest considered friction?

p.s. sitting in a truck so long you lost track of time, due to rain pouring outside, is not fun

• Mika – The force of the ground pushing back on you is the normal force. The force of friction always acts opposite to the direction of the motion. And sorry you guys had rain!