Kortney runs a 50 meter dash. What is her total distance?
50 meters
What is the formula for speed?
Distance/time
What are the two ways we express changing speed?
Average and Instantaneous speed
What is Distance?
How far a person/object travels.
What is Instantaneous speed?
The speed of an object at a give point in time.
You walk outside and see the mail truck at your neighbor's house. You go back inside and when you come out again you see the mail truck has moved to your house. Has motion occurred? How do you know?
You know motion occurred because you had a reference point to where the truck was before.
What are the units for the speed formula?
Meters/seconds
What is a good example of instantaneous speed?
Speedometer
What is displacement?
The distance and direction of an objects change in position.
What is motion?
Kortney runs 50 meters North, then turns around and runs 20 meters south. What is her displacement?
30 Meters north
A passenger elevator travels from the first floor to the 60th floor, a distance of 210 meters, in 35 seconds. What is the elevators speed?
210meters/35 seconds = 6meters/second
Emma is trying to add 15 meters West + 15 meters South. Why can't she add these values?
We can't do calculations for velocity, momentum, or acceleration when we have two or more directions.
What is a reference point?
What is Average Speed?
The total distance traveled divided by the total time of travel
50 Meters North plus 35 meters south = ?
15 meters North
Speed can be graphed using what mathematical concept?
Slope
Why would a storm appear to be moving slower if you are traveling in the same direction as it?
Your relative motion is similar to the Storms
What is Velocity?
The distance an object travels divided by the time plus a directional coordinate.
What is Speed?
the distance an object travels per unit of time
Veronica travels 30 meters east, then travels 45 meters north, then travels 15 meters west. What is her distance traveled and her displacement?
Total Distance = 90 meters
Total displacement = 15meters East, 45 meters north
An object moving at 30meters/second traveled a total of 150meters. How long was the object traveling?
150meters/30meter per second = 5 seconds.
What is an example of something that is moving so slowly that you cannot detect its motion, but you can see evidence of it over a long period of time?
Continents moving on tectonic plates, Earth revolving around the sun, Earth spinning (day and night cycle)
What is Momemtum?
What is Acceleration?
The rate of change of velocity.