Lesson 1 Position
Describing and objects position requires first requires what three things?
Reference point, Distance, Direction
Without being specific what, what is the speed of an object?
The distance covered in a given period of time.
3 ways velocity can change.
Speed up, slow down, change direction.
Acceleration occurs when.....
There is a change in velocity
What is the SI unit for speed? What is the SI unit for acceleration?
Speed: m/s Acceleration: m/s^2
How many dimensions does a compass have? What are they?
2. North-south and East-west
Give a unit of speed that would be incredibly fast if something were traveling at just 1 of this unit.
Kilometer per second
Mile per millisecond
Light year per/ Picosecond
Look at this image of a graph...What type of a graph is it?
Distance/time graph or a speed graph.
Describe a scenario where an object is constantly being accelerated but speed is not changing.
If the object is rotating or revolving around a point.
If I tell you that an object is accelerated at a rate of 150 m/s^2 how fast will the object be going after 4 seconds if it started at 0 m/s.
600 m/s
The distance and direction from a reference point is an objects....
Position
Provide an explantion for why 1 mile per hour is faster than 1 kilometer per second.
Becuse 1 mile per hour covers more distance per time than 1 Kilometer per hour.
Take a look at the same graph...What are the TIME intervals which the objects velocity changed?
about ~(2-5s), ~(10-13s), ~(20-23s), (27-30).
Can acceleration be represented by a graph? How?
Yes. By graphing speed on the y axis and time on the x axis.
Let’s say something was going 10 m/s then 20 seconds later it was going 200 m/s. How can we go about finding the object's acceleration?
9.5 m/s^2
What is the difference between and objects distance and its displacement?
Displacement is the linear distance from start to end while distance includes all of the ground covered from start to end.
One can be even more specific about how an objects position is changing by considering the speed and direction of an object or it's _________________.
Velocity
How is a constant speed represented on a speed time graph?
Horizontal Line
Give an equation for the two graphs on the white board.
Graph 1: d/t. Graph 2: d/t^2
Can a speed time graph tell you everything about an objects velocity?
No it cannot tell the objects direction only its speed.
Describe the location of your school using a reference point that is not the school grounds.
Be reasonably accurate and include what is necessary to describe position.
Velocity should be represented by an arrow. What/How can represent somethings velocity?
How is average speed calculated?
Total distance divided by total time.
What is the equation for acceleration?
(speed final - Speed initial)/time
What is graphed on the y-axis of a speed time graph? Vertical or horizontal?
Speed. Vertical.