- 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- “Understanding Car Crashes p.86” (Left Side) and “Understanding Car Crashes p.87” (Right Side). Head page 86 properly with “Understanding Car Crashes-Connections & Questions-6/1/17 and head page 87 properly with “Understanding Car Crashes- Advanced Organizer-6/1/17.”
- Driving Question Summary Table– Complete the Summary Table on pages 80-81 for the “Forced to Accelerate” (Newton’s second law, acceleration) activities on pages 84-85.
- Educational video– Understanding Car Crashes- It’s Basic Physics– Complete the advanced organizer while watching the video. Tape the organizer as a flip page to p.87. After watching the video, answer the question on page 86: “Which would have been more damaging to the truck: having a head-on collision with an identical truck traveling at an identical speed or driving head-on into the stationary security pillar? Explain.”