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Unit 1 Quiz#1

Use the equations below and your understanding of motion concepts to answer the following questions. Show all your work on calculations. Use complete sentences on explanations. Show units on answers and indicate the direction of all vectors.


1. Seymour Butz views GBS football games from under the bleachers. He frequently paces back and forth to get the best views. The diagram below shows several of Seymour's positions and times. At each marked position, Seymour makes a "U-turn" and moves in the opposite direction. That is, Seymour walks from position A to position B to position C to position D in a time of eight minutes. Study the diagram carefully, and answer the questions.

a. What is the distance walked by Seymour during the eight minutes?

b. What is Seymour's displacement during the eight minutes?

c. Calculate Seymour's average speed. PSYW

d. Calculate Seymour's average velocity. PSYW


Useful Web Links

Distance and Displacement (6 seconds)

Speed and Velocity (8 seconds)


2. Claire deRhoads accelerates her Mazda RX7 from 0 mi/hr, East to 60 mi/hr, East in 5.0 seconds. Determine the acceleration of the Mazda RX7. List appropriate units on your answer. PSYW

Useful Web Links

Acceleration (12 seconds)


3. Upon a recent visit to Mars, you run out of petrol for your spacecraft. So you order 18 grams of petrol. A Martian informs you that the unit system on Mars is different than on Earth. The Martian asks; "How many zooms of petrol do you need?" Use the following information to form conversion factors in order to calculate the amount of zooms of petrol you should order. Clearly show all conversion factors. PSYW

GIVEN: 5 zings = 2 grams; 4 warps = 3 zings; 3 zooms = 2 warps



4. Identify the three controls on an automobile which can be used by the driver to cause an acceleration. Discuss each control, explaining in what sense it controls the acceleration.

Useful Web Links

Acceleration (12 seconds)




5. Sammy Sosa (Chicago Cub's baseball player) hits a pop-up. It leaves his bat traveling upwards at a speed of 40.0 m/s. As the ball travels upwards, its speed decreases in accord with the data at the right.

a. Use the data to determine the acceleration value (singular, not plural) of the baseball. Be sure to include the correct units on your answer.



b. If the baseball is moving upwards and slowing down, then what is the direction (up or down) of the ...

  1. velocity vector?
  2. acceleration vector?

c. In the space at the far right, use bold dots to depict the motion of the baseball during its upward flight. (The initial position of the ball is given.)











Useful Web Links

Acceleration (12 seconds)

Introduction to Describing Motion with Diagrams (5 seconds)

Oil Drop Diagrams (6 seconds)

Vector Diagrams (5 seconds)



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Glenbrook South High School.

Last updated on 8/30/00.