Displacement, Velocity, Acceleration
Calculations
Relative Motion
Previous Concepts
Mrs. Roberts Trivia
100
What is the difference between speed and velocity?
Velocity has a direction;
Speed is scalar, velocity is vector
100
A person walks 40 m east, then turns around and walks 50 m west. What is the displacement?
10 m west
100
Car A is going 45 mph north while Car B is going 40 mph south. What are their relative velocities?
85 mph
100
Predict if there would be a direct, inverse, or no relationship to the scenario:
Number of workers vs time to complete a task
Inverse relationship
100
What is the name of Mrs. Roberts's daughter?
Margot
200
What is the difference between distance and displacement?
Distance is the total length traveled. Displacement is the length of the straight line connecting the start and end.
200
A skateboarder starts from rest and accelerates down a ramp at 1.2 m/s^2 for 6.0 s. How far does she roll?
21.6 m
200
Car A is going 60 mph west and Car(di) B is going 65 mph west. What are their relative velocities?
5 mph
200
A study was done to see the relationship between the time it takes, 𝑥, to complete a college degree and the student loan debt incurred, 𝑦. The equation of the regression line was found to be 𝑦=25142+14329𝑥.
According to the model, if someone has $50,000 worth of student loan debt, how long did it take them to finish their degree? Round your answer to the nearest tenth.
1.7 years
200
Where did Mrs. Roberts grow up?
Colorado
300
Describe what is happening in terms of displacement/velocity/acceleration in section E.
Motion is stopped
300
If a car goes from 10 m/s to 30 m/s in 5 seconds, what is the car's acceleration?
4 m/s^2
300
Two joggers start 500 m apart and run toward each other. Alice runs east at 3.0 m/s, Bob runs west at 2.0 m/s. How long until they meet, and how far from Alice’s starting point do they meet?
100 s, 300 m
300
An organ pipe produces a musical note with a wavelength of 2.72 m. What is the frequency of this note if the speed of sound is 348 m/s?
128 Hz
300
For how many years did Mrs. Roberts teach math?
9 years
400
Describe what is happening in terms of velocity/acceleration in section C.
Constant velocity in negative direction
400
A car accelerates from rest at 2.0 m/s^2 and travels 50 m. How long has it been accelerating?
7.1 seconds
400
A mail carrier is 15 meters ahead of a dog when the dog spots them. The mail carrier walks at a constant speed of 2 m/s, and the dog runs after them at a constant speed of 6 m/s. How far from the dog’s starting point will the dog catch up to the mail carrier?
22.5 m
400
Identify all kinds of light on the EM spectrum.
Radio, microwave, infrared, visible, ultraviolet, x-ray, gamma
400
Mrs. Roberts was a college athlete for which sport?
Ultimate frisbee
500
Describe what is happening in terms of displacement/velocity/acceleration in section D.
Decelerating in the negative direction
500
Based on the velocity-time graph, find the total displacement. (Note how the x- & y-axis are scaled)
550 m
500
Two cyclists start 60 km apart and ride toward each other. Cyclist A rides at 12 km/h and Cyclist B at 18 km/h. How long until they meet, and how far from Cyclist A’s starting point do they meet?
2 hours, 24 km
500
How many Mg are in 14 kg?
0.014 Mg = 14 kg
500
What is Mrs. Roberts's Hogwarts house?
Slytherin