Presentation on theme: "Unit II: Fast and Furious"— Presentation transcript:
1 Unit II: Fast and Furious VocabularySpeed: the ratio of the distance an object moves to the amount of time the object movesVelocity: the speed and direction an object is moving, measured relative to a reference pointAverage speed: the total distance traveled divided by the time it takes to travel that distanceInstantaneous speed: the rate at which an object is moving at a given moment
3 GA StandardS8P3. Students will investigate relationship between force, mass, and the motion of objects.a. Determine the relationship between velocity and acceleration. (DOK 2)
4 Speed It is a rate! What does that mean? A change over time. What is the change?Change in position, in other words, distance.Standard unit: meters per second (m/s)
5 Speed – 2 types Instantaneous –rate at a given moment in time Example: speedometer in a car
6 Calculation Average speed – rate for the duration of an entire trip This can be calculated…ready for the equation?v = d/tv – velocityd – distancet – timeWhat units do we use?Try the practice problems.
7 Identify the Variables 1. A train travels 190 km in 3.0 hours and then 120 km in 2.0 hours.2. A car travels 85 km from Town A to Town B, then 45 km to Town C. The entire trip took 1.5 hours.
8 Velocity What makes velocity different? It is a vector! It is essentially speed (magnitude) and direction3 ways to change velocity:Change in speedChange in directionChange in both
9 Graphing VelocityVelocity is demonstrated on a distance vs. time graphThe slope of the line demonstrates speed/velocityThe steeper the slope, the higher the speed
10 Recap Explain how speed is considered a rate. How does velocity differ from speed?What shows the speed on a distance-time graph?