Hewitt Drew-It! PHYSICS Screencasts
Newton's Third Law and Newton's Laws Problems


21. Newton's Third Law
Paul and wife Lil illustrate that one cannot touch without being touched — with supporting examples.

22. Newton's Laws Problem
Paul covers some good physics with an explanation of the classic 2-mass-pulley problem.

23. Nellie in an Elevator
Paul investigates the forces that act on Nellie Newton in an elevator.