tailieunhanh - Lecture Science 1 - Associate Degree in Education: Lecture 21 - Dr. Arshad Bashir

Lecture 21 - Measuring motion. This week, Students deepen their understanding of force and motion. They spend time measuring and graphing the speed of their model car at specific points in time. In addition to collecting data about the movement of their model car, they also practice graphing the data. As a visualization of data, a graph allows you to quickly determine if the car is: travelling at a steady rate, moving at different speeds, changing speeds over a given distance. | Lecture # 21 SCIENCE 1 ASSOCIATE DEGREE IN EDUCATION Measuring motion Speed and Velocity Many Students might already know that when the model car is travelling, the expression for relating distance and time is: speed = distance/time. But a distinction needs to be made between the speed of an object and its velocity. Speed refers to a quantity; velocity refers to a quantity and direction. When specifying velocity, you also need to indicate the direction the object is moving. Weekly Plan This week, Students deepen their understanding of force and motion. They spend time measuring and graphing the speed of their model car at specific points in time. In addition to collecting data about the movement of their model car, they also practice graphing the data. As a visualization of data, a graph allows you to quickly determine if the car is: travelling at a steady rate moving at different speeds changing speeds over a given distance. Experimenting with speed and momentum Tell Students that this week they will investigate motion. They will do so by obtaining quantitative data about the speed of their model car at various points in time. Hand out yardsticks (or measuring tape) and a stopwatch (or a watch that shows seconds) to each group. Tell them to work with the knowledge about forces from last week and design a scenario in which: their model car moves the longest distance their model car reaches the highest speed. Students should have the same experience and should focus more on the relatively difficult concept of gravity. To do so, have all groups work with their cars going down ramps instead of using other propulsion mechanisms that are harder to quantify (such as a push with a hand or the tension of rubber bands). They can build simple ramps using a piece of plywood and some bricks or books. For better incline comparison, bricks of the same height will work better than different books. Experimenting with speed and momentum Use the entire session for Students to . | Lecture # 21 SCIENCE 1 ASSOCIATE DEGREE IN EDUCATION Measuring motion Speed and Velocity Many Students might already know that when the model car is travelling, the expression for relating distance and time is: speed = distance/time. But a distinction needs to be made between the speed of an object and its velocity. Speed refers to a quantity; velocity refers to a quantity and direction. When specifying velocity, you also need to indicate the direction the object is moving. Weekly Plan This week, Students deepen their understanding of force and motion. They spend time measuring and graphing the speed of their model car at specific points in time. In addition to collecting data about the movement of their model car, they also practice graphing the data. As a visualization of data, a graph allows you to quickly determine if the car is: travelling at a steady rate moving at different speeds changing speeds over a given distance. Experimenting with speed and momentum Tell Students that