Chapter 2 Describing Motion Scalar vectors Velocity vs

Chapter 2 Describing Motion Scalar & vectors Velocity vs speed Distance &Displacement Speed: Average & Instantaneous

Bell Ringer • RIGHT NOW!!! • Get back with yesterday’s group – Finish Lab 30 mins • NB: If you were not here ( at least 4 of you) – Create a group of 4. – Complete Lab activity.

Lesson Objectives • A. We will distinguish between vector and scalar quantities. • B. We will also distinguish between and calculate average & instantaneous speed & velocity • I will create graphic organizers to distinguish between vectors & scalars, & average vs instantaneous speed. I will calculate speed.

Agenda • Bell Ringer- Finish Lab 30 mins • Regroup - Discuss Results 20 - 30 mins • Vocab Exercises 30 mins – Scalar vs vector card match. Create T chart – Distance vs Displacement- drawing – Speed vs Velocity- Venn diagram – Instantaneous vs average speedhalf sheet

Velocity Mini Lab Results • Tables/charts/calculations • Discussion: What did we notice? (Patterns/Trends)

Velocity Chart/Table/Graph

Conclusion • What was our prediction? • Was it correct or not? • What explanations do we have for these results?

• What explanations do we have for these results? • Gravity • Weight/force • friction

Acceleration Mini Lab Results • Tables/charts/calculations • Discussion: What did we notice? (Patterns/Trends)

Acceleration Chart/Table/graph

• What was our prediction? • Was it correct or not? • What explanations do we have for these results?

Agenda • • Bell Ringer- Finish Lab Regroup- Discuss Results Vocab Exercises: Scalar vs vector card match- Create T chart • Distance vs Displacement-Venn diagram • Speed vs Velocity-venn diagram • Instantaneous vs average speed- half sheet

Open Sort • Sort the Cards into categories

HINT

Closed Sort • Sort the cards into • Scalar & vector 2 categories :

Objective • We will “distinguish” between vector and scalar quantities. You will draw a T chart to compare & contrast vector & scalar quantities

Vectors and Scalars Quantities are divided into scalars and vectors. A scalar quantity is one that has only magnitude (size). A vector quantity has both magnitude (size) and direction.

Create a T chart • Scalars • Definitions: • Examples: Vectors

Learning check • Decide whether these are scalar or vector quantities. • • momentum Force Speed Velocity Mass Distance Weight

Objective • We will “distinguish” between distance and displacement. You will draw a picture to show the difference.

Distance and Displacement Starting from origin, O a person walks 90 -m east, then turns around and walks 40 -m west. Q: What is the total walked distance? Q: What is the displacement?

Distance and Displacement Starting from origin, O a person walks 90 -m east, then turns around and walks 40 -m west. Q: What is the total walked distance? A: 130 -m Q: What is the displacement? A: 50 -m, due east.

Distance and Displacement Marco jumps 1 m and then falls back 1 m to the ground. Q: What is the total distance? Q: What is the displacement?

Distance and Displacement Draw a picture of a persons movement where their displacement is zero but their distance is large. YOU MUST Label their start & end point.

Objective • We will “distinguish” between speed and velocity. You will Create a Venn diagram to compare differences & similarities.

Speed vs. velocity How does speed differ from velocity?

Speed- the distance travelled in a given time.

Velocity = Speed with Direction Velocity can be changed by changing speed or direction or both.

Learning check • Which of these are speed and which are velocity? • • 40 m/s 60 m. PH west 50 k. PH 30 ms-1 northeast

Speed vs Velocity

Objective • We will “distinguish” between instantaneous speed and average speed. You will Complete Half sheet

Learning Check

Instantaneous Speed • Read & Complete the Half sheet on Instantaneous speed

Average Speed Average speed equals the total distance traveled divided by the total time of travel. Speed Units: m/s or ms-1 (Sometimes-MPH, km. PH)

Instantaneous speed http: //www. physicsclassroom. com/ mmedia/kinema/trip. cfm The (velocity) speed at a given instant in time. Units: m/s s=d t s = distance time