Newton's 3d Law
Most recent answer: 01/15/2018
- Vanshaj Agarwal (age 16)
Newton's 3d law doesn't say that all the forces on any one object add up to zero. If that were true, nothing would accelerate. It says that all the forces on everything add up to zero, so that if something accelerates one way, something else accelerates the other way.
Obviously there's a force between the ball and the floor, otherwise the ball would keep falling right through the floor. The general form of Newton's laws says nothing about whether that force is big enough to make the ball bounce back. Some balls do, some don't.
(published on 01/15/2018)