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Chapter 13 Section 1: Motion

Chapter 13 Section 1: Motion. Objective: Apply proper equations to solve basic problems pertaining to distance, time, speed, and velocity. Distance and Displacement. Distance is a measure of the space between two locations.

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Chapter 13 Section 1: Motion

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  1. Chapter 13 Section 1: Motion Objective: Apply proper equations to solve basic problems pertaining to distance, time, speed, and velocity.

  2. Distance and Displacement • Distance is a measure of the space between two locations • Displacement is the measure of the space between two locations measured along the shortest path connecting them. • Distance and direction

  3. Relative Motion • Reference point: nonmoving object • Relative motion: the position of an object described relative to another object.

  4. Speed • Speed: the distance you traveled divided by the time it took to travel the distance. • Constant Speed: for an object traveling at constant speed, the object’s speed at any interval of time does not change. • Average Speed = Distance/Time _ • V= d/t

  5. Velocity • Velocity =Displacement /Time

  6. Acceleration • Acceleration: the change in velocity divided by the amount of time required for the change to occur. • Speeding up, slowing down, or changing directions is considered accelerating

  7. Chapter 13 Section 2: Forces and Motion

  8. Force • Force: a push or a pull that one object exerts on another object • Force has both a size and a direction.

  9. Forces Combine • net force: the combination of all the forces acting on an object • Forces can combine in the same direction or the opposite directions. • Draw AND write the captions for figure 7 on page 404.

  10. Balanced and Unbalanced Forces • Balanced forces: if the forces acting on the object have a net force of zero • Unbalanced forces: if the forces acting on an object do not have a net force of zero

  11. Contact and Noncontact Forces • Contact forces: a force that is exerted only when two objects are touching. • Noncontact Forces: forces that are exerted on objects without touching. • Ex: gravity, magnetic forces

  12. Gravity and Friction • Gravity: a noncontact force that every object exerts on every other object due to their masses. • Weight: gravitational force Earth exerts on an object • Mass: amount of matter the object contains • Friction: is a contact force that resists the sliding motion of two objects touching

  13. Air Resistance • Air resistance: a contact force that opposes the motion of objects moving in the air

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