# Physical Science 23

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## Force and Motion

Forces are a push or pull on an object. Forces can be due to phenomena such as gravity, magnetism, or anything that might cause a mass to accelerate. In physics, a force is any interaction that, when unopposed, will change the motion of an object.

#### Videos

3:32 Newton’s 3 Laws, with a bicycle – Joshua Manley

6:21 Newton’s 3 (three) Laws of Motion

7:18 Newton’s Three Laws of Motion

#### Debate

Cars are more massive than motorcycles – and arguably safer than motorcycles if an accident takes place. Motorcycles tend to be faster – and accelerate more quickly than cars. Motorcycles consume less fuel than most cars.

• Position A: Motorcycles should be banned. Individuals and families should only be permitted to purchase cars.
• Position B: Cars should be banned. Individuals and families should only be permitted to purchase motorcycles.

#### Instructor Resources

###### Standard Daily Material
• Day 1 – Standard material – introduction day
• Day 2 – Standard material – reading day
• Day 3 – Standard material – make a presentation
• Day 4 – Standard material – give a presentation
• Extra! – Enrichment and remediation options

#### Special Notes

Instructor Emphasis:

• Science & Engineering Practice: Use mathematical and computational thinking.
• Cross-Cutting Concept: Cause and Effect: Mechanisms and explanations.
###### Standards Concepts

Momentum is determined by the speed of an object and the direction it is traveling (velocity) of an object and the object’s mass. This momentum is conserved as long as there are no new objects added to the system.

• Momentum is a vector quantity.
• Momentum is mass in motion, whereas forces are pushes or pulls applied to an object or mass.
• Momentum is conserved in a collision.