1/27 & 1/28 - 8th Grade Agenda Learning Objective: Learn about Speed & Velocity Collect HW: Reading & Notetaking: p.158 - 160 Video: Science in Action Motion Textbook Reading p. 346 - 347 HW: Reading & Notetaking p.161 - 162 Reminder: Data Table, Graph & Procedure due 2/5 (15 Points)

Daily Reflection Prompt: What is the formula for calculating velocity?

What is the formula for calculating speed?

Which Speed is fastest? 5 300 2 1000

Which Speed is fastest? 5 km 300 cm 2 km 1000 m

Which Speed is fastest? 5 km / hr 300 cm / hr 2 km / sec 1000 m / hr 2 km/sec is the fastest We need both the distance and time unit of measurement to determine speed

What is average speed? The total traveled divided by the total time elapsed. The speed of an object along the path traveled can vary

What is difference between velocity and speed? Velocity: Speed of the object and direction of motion Speed: Just the speed. We don’t know the direction of motion

A car was traveling north at 50 km/hr A car was traveling north at 50 km/hr. It started to travel northwest at 50 km/hr. Did the speed change? Did the velocity change? Speed did not change Velocity changed

What is slope of a line? The steepness, or slant, of a line on a graph Slope tells you the rate of change. What is the slope of the graph? 10 m/s

How much did the jogger travel after 1 minute? About 200 Meters

How much did the jogger travel after 5 minutes? About 800 Meters

How much did the jogger travel after 8 minutes? About 800 Meters

Did the jogger move between the 5 minute and 8 minute mark? No. The jogger was at rest

Calculating Slope Rise over Run

What is Acceleration? Rate at which velocity changes Increase in speed Decrease in speed Change in direction

What are some examples of objects continuously changing direction? Ferris Wheel Moon Earth

If a car keeps a steady speed of 100 km/hr on the highway but changes directions slightly, is it accelerating? Yes

What is the formula for calculating acceleration?