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Connections between Physics and the MPV

Connections between Physics and the MPV. To be done after the MPV project is finished. What is physical science?.

carolyn-kirkland
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Connections between Physics and the MPV

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  1. Connections between Physics and the MPV

  2. To be done after the MPV project is finished

  3. What is physical science? • This science course is meant to be a bridge from the science you learned in middle school and the more formal and challenging course you will complete in the rest of your high school career • Meant to expand your knowledge AND fill in any gaps

  4. Physical science @ Cab • Divided into 3 sections: • Physics • (focused on motion, forces and energy) • Chemistry • (Focused on creation and interaction of all things) • Earth and Space Science • (the life cycle of this planet and the stars)

  5. Introduction of Physics • Meant to be the culmination of you were taught in 8th grade • More depth, with connections to mathematics

  6. Definition of physics • A study of matter, energy and the interaction between them. • In our life, the ideas of physics can be used to explain how and why items move, stay up, break apart, fly or fall down. Any interaction between any two objects or the surrounding environment has a physics explanation.

  7. Uses of Physics • Description • Prediction (Precision and Accuracy) • When will an object move? • How fast or how far? • How much effort is needed to tear apart an object? • Where is the best location to apply that effort?

  8. Fundamental concepts of Physics • In your composition book write the best idea you have for a definition of each of the following: • Displacement • Velocity (constant, nonconstant) • Acceleration • Force • Energy

  9. Lets hear your ideas

  10. Displacement

  11. Displacement • Measurement of the length an object has traveled, based on the difference between its starting position and its final position • If there is not difference, no displacement has taken place • Measured in meters (as standard)

  12. Questions about displacement • What are 2 ways that your MPV could achieve a displacement of zero(0m)? • What does it about the motion of your if it has a negative displacement (-5m)? • Your moves forward 12 m, but then reverses 7m before coming to rest. Another student’s car moves just 5m forward before it stops completely. Which car had the greater displacement?

  13. Velocity

  14. Velocity • Velocity is the measure of the rate at which something moves. • The overall or average velocity can be calculated by dividing the total displacement by the total elapsed time • (v)elocity = (d)isplacement / t(ime) • Standard units of measure are m(eters)/s(econds)

  15. Questions on velocity • If your car has an average velocity of 1.5 m/s, does that mean your car travels at that rate at every moment along that trip? • What is the average velocity of your car if it takes 3.5 seconds to travel 6 meters? • Which rate is faster, 3.1 blocks/s or 1.3 m/s?

  16. Metric Conversions • See separate notes

  17. Constant velocity • A object is at constant velocity if its rate of motion does not change over time. • Someone walking down the hall moves at constant velocity in an empty hallway • Non-constant velocity is the opposite of constant velocity

  18. Questions on constant velocity • Does your car move with constant velocity as it travels down the hallway?

  19. Distance and Speed • Distance and speed and other ways to measure length an object travels and how fast an objects move, but do not take into account any change in direction 1. What is the distance and average speed a rocket travels from earth to the moon, and back? • If no change in direction, magnitudes are the same as displacement, velocity

  20. Acceleration

  21. Acceleration • Is the measure of the change in the velocity of an object over time. • Any change in velocity, getting faster , getting slower, or changing direction indicates the object accelerates

  22. Acceleration • Imagine in your mind the best run of your car Divide the run into sections; a. where your car was accelerating • where your car moved with constant velocity 2. What is the minimum number of sections any run should have? Explain your answer 3. What caused the acceleration? The constant motion?

  23. Forces

  24. Forces • Any push or pull exerted on an object • Forces can be divided into two main types: • Contact Forces • Field Forces

  25. Contact Forces • Any force resulting from the interaction of particles from 2 or more objects • Examples: • Applied forces • Friction forces • Air resistance

  26. Field Forces • Forces applied at a distance, do not require contact between objects • Gravitational pull • Magnetic push/pull • Electrical push/pull

  27. Questions on forces • What forces were being applied to your car as you released the back axle for a run? Are they field or contact? • Which forces were important in making the car speed up? Slow down? • Were the amounts of applied forces constant throughout the run?

  28. Energy

  29. Energy • The ability to make objects move • Can be used (transferred or transformed) or stored

  30. Energy questions • What object(s) that made up the MPV possessed energy that was used to make the it move? • What object(s) that compose the MPV received energy and moved? • What happened to the energy in those objects as they slowed down and stopped?

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