- For any pair of interacting objects, the force exerted by the first object on the second object is equal in strength to the force that the second object exerts on the first, but in the opposite direction (Newton’s third law).
- The motion of an object is determined by the sum of the forces acting on it; if the total force on the object is not zero, its motion will change. The greater the mass of the object, the greater the force needed to achieve the same change in motion. For any given object, a larger force causes a larger change in motion.
- All positions of objects and the directions of forces and motions must be described in an arbitrarily chosen reference frame and arbitrarily chosen units of size. In order to share information with other people, these choices must also be shared.
- Do Now– Get out your science notebook and add to the Table of Contents- “What Changes Motion? p.82” (Left Side). Head page 82 properly with “What Changes Motion- Connections & Questions-5/17/17.”
- Connections & Questions– On page 82, answer the following questions (Write-Pair-Share): What did you learn about the collision between the truck and the security pillar from your investigation of the motion of the cart and the washers? (Try to use new science vocabulary!) What still confuses you?
- Textbook Assignment– Read pages 6-15. Define key words on page 6. Answer all questions 1-3 on page 15.