Do Now:
Please copy the homework into your agenda.
Complete these Vector Problems
Use vectors to show motion (to a stationary observer) of a dog swimming south in a river that also flows south. The dog swims at 2.1 m/s and the river flows at 1.7 m/s.
Use vectors to show the combined motion (to a stationary observer) of a boat motoring East at 7.9 m/s in an ocean tidal current that flows North at 2.2 m/s.
Homework to be completed:
Final Motion Test Thursday, October 20, 2022
Motion Test Study Guide
No other homework
Today’s Lesson:
Review Do Now
Review lesson outline
Force and Friction Notes
Forces -
push or pull
contact versus non-contact
mechanical
gravity
electric
magnetism
Friction
opposes motion or other forces
air resistance
water resistance
contact rubbing
weight, shape and surface roughness affect strength of contact friction
friction simulation PhET
Demonstrate.
Complete in GC.
What are the round particle shown on the sim?
What are they “doing” before you begin rubbing the books together (describe their motion)?
How does rubbing the books together affect the particle (describe)?
How does rubbing the books together affect the temperature of the books (describe)?
