Show:
Position
Vectors
Graphs of Motion
Acceleration
Free Fall
100
DEFINE “position”
The place where something is located.
100
DEFINE “vector.”
A quantity that can have both size and direction
100
On a speed/distance graph, which axis will you put “time” on?
Time goes on the x-axis.
100
DEFINE “acceleration.”
Any change in velocity (any change in speed or direction)
100
DEFINE “free fall.”
falling through the air, with gravity as the only force on the object.
200
Where on a coordinate graph does the position have a value of zero?
at the origin (0,0)
200
Is speed a vector? Why or why not?
No, because it only tells you “how fast.”
200
What goes on the y-axis of a speed/distance graph?
The dependent variable, or the position
200
Is moving at a constant speed of 70 mph. acceleration? Why or why not?.
No, because there is no change in speed.
200
Which of these is a projectile: arrow shot from a bow, a bird, an airplane?
The arrow. The bird and the airplane are using forces to stay up.
300
Is there any variable for motion & position that can only be positive?
Yes. Distance.
300
Give an example of velocity.
North at 25 mph, south at 30 mph, headed downtown at 10 mph. (anything with a speed and a direction)
300
What can you tell from the angle of the line on a speed/distance graph?
The steeper the line, the faster the speed.
300
Is slowing down to avoid a crash acceleration? Why or why not?
Yes, because there is a change in speed.
300
DEFINE “acceleration due to gravity.”
The rate at which a falling object speeds up: 9.8 meters per second per second.
400
Which axis on a coordinate graph is the X-axis (vertical or horizontal)?
The horizontal axis is the X-axis.
400
What information is provided by the arrow you draw for a vector?
The direction of the force or movement, and the size of the force or movement.
400
How can you tell from a speed-distance graph is the speed is constant?
The line will be perfectly straight diagonal line.
400
If you are turning a corner, is that acceleration?
Yes, because it is a change in direction.
400
What did Galileo discover in his famous experiment?
If two similar objects but with a different mass are dropped from a height at the same time, they will hit the ground at the same time.
500
Are (3,4) and (4,3) at the same point on a coordinate graph?
No. The position (3,4) is 3 over and 4 up. The position (4,3) is 4 over and 3 up.
500
Why is gravity a vector?
The size is the amount of pull, and the direction is towards the center of the Earth.
500
What is the formula for speed?
S = D/T (Speed is equal to Distance divided by Time).
500
What is the force that holds an object in a circular path? (for example, the Moon orbiting around the Earth)?
The force is the pull of gravity.
500
What is the path of a projectile?
A projectile travels in a curved line called a parabola.