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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