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Understanding Forces and Friction through Air Hockey Physics Demonstration

This educational resource explores the physics of air hockey to demonstrate various types of forces and their effects on objects. It covers fundamental concepts such as friction, normal force, gravity, and the relationships between force, mass, and acceleration. Through a series of visualizations, students will learn how to draw force vectors for an air hockey puck in different scenarios: stationary, being pushed, and accelerating. This interactive approach helps students grasp the principles of physics and their real-world applications.

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Understanding Forces and Friction through Air Hockey Physics Demonstration

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  1. Air Hockey Physics Demonstration PS1B

  2. PS1B: Types of Forces I can: • Describe what causes friction • Describe the forces acting on an object: • normal force • frictional forces • Weight (mg) • Gravity • effort force • resistance forces • Describe the relationship between force, mass and acceleration

  3. 1. Air hockey puck (off & not moving) • Draw an air hockey puck • It is off and not moving • Draw in the force vectors Normal Weight (mg)

  4. 2. Air hockey puck (off & being pushed to the right…not moving) • Draw an air hockey puck • It is off and being pushed • Draw in the force vectors What is the effort force caused by? Normal Friction Effort Weight (mg)

  5. 3. Air hockey puck (off & being pushed to the right…not moving…mass added) • Why is the weight vector arrow bigger? • Will this have more or less friction than a lighter hockey puck? Why? • Draw an air hockey puck • It is off and being pushed • Draw in the force vectors Normal Friction Effort Weight (mg)

  6. 4. Air hockey puck (off & being pushed to the right…speeding up) • Draw an air hockey puck • It is off and being pushed so it speeds up • Draw in the force vectors Normal Friction Effort Weight (mg)

  7. 5. Air hockey puck (off & coasting) • Draw an air hockey puck • It is off and coasting • Draw in the force vectors Normal Friction Weight (mg)

  8. 6. Air hockey puck (on & not moving) • Draw an air hockey puck • It is on and not moving • Draw in the force vectors What is the effort force caused by? Effort Weight (mg)

  9. 8. Air hockey puck (on & pushed right (not moving) • What is the friction caused by? • Draw an air hockey puck • Draw in the force vectors Effort 1 Friction Effort 2 Weight (mg)

  10. 9. Air hockey puck (on & pushed right (speeding up) • What is the friction caused by? • Draw an air hockey puck • Draw in the force vectors Effort 1 Friction Effort 2 Weight (mg)

  11. 10. Air hockey puck thinner (on & coasting) • Why is friction smaller? • Draw an air hockey puck • Draw in the force vectors Effort 1 Friction Weight (mg)

  12. 11. What causes friction to be stronger? • More massive objects • More gravity (if a bigger planet) • Moving/pushing an object more • Moving faster • Something that grips the ground more (surfaces that grip better) • Shape of the object (less aerodynamic)

  13. 12. More mass means it will accelerate faster or slower? Why? • Faster • Because there is more atoms being pushed onto the ground • Grips the ground more • More friction (resistance force) to overcome

  14. 13. Pushing with more force will cause an object to accelerate faster or slower? Why? • Faster • Because there is more effort force

  15. PS1B: Normal, Effort, Friction, Resistance Forces I can: • Describe what causes friction • Describe for an object the: • normal force • frictional forces • Weight • Gravity • effort force • resistance forces • Describe the relationship between force, mass and acceleration

  16. Rate your ability on the following learning target:Describe what causes friction • F: I don’t understand how.I make lots of mistakes. • D: I have a below average understanding. I can do it, but make many mistakes. • C: I have an average understanding.I can do some of it, but I make several mistakes. • B: I have an above average understanding. I could do it myself without help, but I sometimes make a few mistakes. • A: Excellent understanding. I could teach how to do this to someone else. I rarely make mistakes. 0 0 0 0 0

  17. Rate your ability on the following learning target:Describe for an object the: normal force, frictional forces, Weight, gravity, effort force, resistance forces • F: I don’t understand how.I make lots of mistakes. • D: I have a below average understanding. I can do it, but make many mistakes. • C: I have an average understanding.I can do some of it, but I make several mistakes. • B: I have an above average understanding. I could do it myself without help, but I sometimes make a few mistakes. • A: Excellent understanding. I could teach how to do this to someone else. I rarely make mistakes. 0 0 0 0 0

  18. Rate your ability on the following learning target:Describe the relationship between force, mass and acceleration • F: I don’t understand how.I make lots of mistakes. • D: I have a below average understanding. I can do it, but make many mistakes. • C: I have an average understanding.I can do some of it, but I make several mistakes. • B: I have an above average understanding. I could do it myself without help, but I sometimes make a few mistakes. • A: Excellent understanding. I could teach how to do this to someone else. I rarely make mistakes. 0 0 0 0 0

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