Finding the center of mass

Links and useful resources

• START HERE: Physics 2024 class outline
• Physics classroom online interactive tools
• OpenSTAX high school physics
• NotebookLM physics notebook
• Physics projects
• AP Physics 1 Dan Fullerton videos

Lesson-specific resource links

• #hw (science) Read https://www.snexplores.org/article/some-stress-may-help-young-people-build-resilience. 2025-04-21
• #hw (phys) Read The greatest flood in Earth's history 2025-04-23

Lightning Round Questions

• Explain the concept of Inertia
• How would you tell an Arduino to output a PWM signal of 50% duty cycle on PWM pin 9?
• A bowl of water sitting on a scale reads 1 kg. You submerge an object hanging from a string, so that it doesn't touch the bottom of the dish. The scale now reads 1300 grams. What is the volume of the object?
• What is the formula for kinetic energy of a moving mass?
• What is the SI unit equivalent to a Newton?
• How many cubic centimeters are in a liter?

gr7: [lightning:: 5]
gr10: [lightning:: 1]

Lesson content with examples

• Center of mass
• center of gravity
• Balance

Media resources

• Youtube search for "Center of mass"
• Youtube search for "center of gravity"
• Youtube search for "Balance"

Checking homework

Guided practice

• Find the center of mass of three oddly-shaped objects.

Homework

• #hw (physics) ACE Response: "Being challenged is important for kids' development." Consider the statement and argue for or against it, using any article you want for evidence. 2025-04-21
• #hw (physics) Think about how to extend the flat-object center of mass procedure we used into one that works for a three-dimensional object. Write your procedure with clear steps. What is the smallest number of measurements you would need in order to mark the center of mass of a three-dimensional object? 2025-04-16