Concepts
Position vs Time
Velocity vs Time
Solving for...
Random
100
What is our Unit for Velocity in this class
m/s
100
What does the slope of a position vs time graph represent?
Velocity
100
What does the slope of a velocity vs time graph represent?
acceleration
100
Kara goes to hand the ball off to Jordan. If Jordan travels a distance of 20 m in 5 seconds what was Jordan's velocity? (Units !)
V = delta x/t
V = 20 /5
V = 4 m/s
100
What is better, sour cream and cheddar ruffles or sour cream and onion chips?
Sour cream and cheddar
200
What is the difference between speed and velocity
Speed is how fast something is going
Velocity is how fast something is going with a direction
200
What does a horizontal line represent on a position vs time graph? (What does it say about position?)
The object is at rest (it is not moving, has a velocity of zero, is at the same position)
200
What does a horizontal line represent on a velocity vs time graph? (What does it say about velocity?)
Velocity is constant
200
Marissa starts with a velocity of 0 m/s. When NJ says hike she accelerates at 3 m/s2, finishing with a final velocity of 6 m/s. How long did it take Marissa to reach her final velocity? (Units!)
a= (Vf - Vi) / t
3 = (6 - 0) / t
3t = 6
t = 6/3 = 2s
200
What is the superior dipping sauce to a soft pretzel?
300
The difference in the object’s position from the start to the finish is called what?
Displacement
300
In the picture below, explain what happens at 1 second.
The person is moving to the right and then turns around and starts moving to the left.
300
In the graph below, at what time is the object moving the fastest?
From 1-2 seconds
300
Solve for acceleration in the table below (Units!)
Vf - Vi / t
26 - 30 / 1
-4 m/s2
300
What year was the declaration of independence signed?
1776
400
What does it mean when we say "a car is accelerating at a rate of 20 m/s/s"
The car is changing velocity at a rate of 20 meters per second every second.
400
In the graph below, in what section is the object moving the fastest? Explain how you know.
At part A. Since this is a position vs time graph, we know our slope is equal to the velocity. Since part A has the biggest slope, it would also have the biggest velocity.
400
In the Velocity vs time graph below: At 1s which car had the greater velocity? At 1s which car had the greater acceleration?
Car B has the greater velocity but Car A had the greater acceleration. (A has the greater slope, and therefore a greater acceleration but B's velocity at one second is greater)
400
The Moving man starts at position 6. He goes to his house to grab his lunch and then walks to the tree to have a picnic. What is his
Final position, Distance and Displacement
Xf = -8m
Distance = 2 +16 = 18 m
Displacement = Xf - Xi
Disp = -8 - 6 = -14 m
400
Why do scuba divers dive backwards off a boat?
500
Give an example of something that has a negative acceleration but is also getting faster
Any object that is speeding up and also going to the left
500
Explain in as much detail: What is happening in the graph below? (must include: Starting position, final position, direction, what is happening to the velocity and how you know.)
The object starts at a positive position and moves to the left, ending at the 0-meter position. As the object moved it was speeding up, as shown by the slope that gets steeper and steeper.
500
In the graph below, explain as specifically as possible what is happening from 0-2 seconds. (must include: Starting velocity, final velocity, direction, and what is happening to the velocity)
The object starts out at -5 m/s, moving left, and slows down and turns around at 1 s. It then proceeds to speed up as it moves right until it reaches 5 m/s.
500
Solve for the velocity of the person walking in the graph below
V = Change in x / t
V = Xf - Xi / t
V = 0-20 / 4
V = -20 / 4 = -5m/s
500
How does a train hear another train coming down the track?