- this day in class we began to formally look into forces
- we began class with a ticket in the door activity that asked the students two questions
1. Compare and contrast a person in space and a person on Earth. What makes someone in space behave differently than someone on Earth?
2. What do you think makes something start to move? What do you think makes something stop moving? Propose a scientific explanation to defend your hypothesis.
- the ticket in the door sparked some good conversation and highlighted to me that the students were coming into this lesson with a great deal of background knowledge
- after the ticket in the door I showed the students two short video clips
1. a science graduate student asking people "what is a force?"
What is a Force?
2. footage from the Apollo 8 launch
Apollo 8 Launch
- we then discussed that for something to be a force it must have 4 things
1. a force is a push or a pull
2. all forces have size and direction
3. forces are measure in Newtons (N)
4. not all forces result in motion
- things move when forces are not balanced
- when forces are balanced there is no motion and when forces are not balanced there is motion
- to practice the concept of balanced and unbalanced forces we worked on some mini white board problems
- we then briefly discussed the force known as friction
- friction is the force that opposes motion
- friction can occur when things are moving (kinetic friction) and when things are not moving (static friction)
- there are three types of kinetic friction ... sliding, rolling, and fluid
- to display their new knowledge of friction I asked the students to either act, sing, or draw an example of kinetic friction or static friction
Homework
- make up any late work
Science News
Bad Decisions Arise From Bad Information, Not Faulty Brain Circuits
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