Extracted from http://www.glenbrook.k12.il.us/gbssci/phys/THender/quizzes/

Unit 1 Quiz#1

Fill in the Blank:

1. A _________________ quantity is completely described by its magnitude.2. A _________________ quantity has both magnitude and direction.

3. The velocity of an object at any given instant in time is known as the _________________ velocity.

4. The rate at which the velocity changes is known as the __________________.

 

 Multiple Choice:

1. Which of the following represents a speed?

a. 6 km

b. 4 min/km sec

c. 2 km/sec2

d. 8 m/sec 

2. Which of the following represents an acceleration?

a. 6 m2/sec2

b. 6 min/km sec

c. 10 km/hr

d. 2 m/sec2

For Questions (3) and (4), consider the following sentence:

A boy walks 150 meters due east and then turns around and walks 30 meters due west.

3. The boy walked a distance of

a. 30 meters

b. 150 meters

c. 120 meters

d. 180 meters

 4. The boy's displacement is

a. 30 meters east

b. 150 meters east

c. 120 meters east

d. 180 meters west

Problems and Short-Answer:

1. Fernando Vázquez 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, Irureta makes a "U-turn" and moves in the opposite direction. Study the diagram carefully, and answer the questions.

a. What is the distance walked by Vázquez during the ten minutes? __________

b. What is Vázquez's displacement during the ten minutes? __________

c. Calculate Vázquez's average speed.

d. Calculate Vázquez's average velocity.

 

2. Roi King is traveling down Lake Avenue with a velocity of +20 m/s. Misfortune occurs, and Renatta's engine stops running. King comes to rest 40 seconds later. Calculate Roi's acceleration.

 

3. Upon a recent visit to Mars, you run out of petrol for your spacecraft. So you order 28 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.

5 zings = 4 grams

2 warps = 3 zings

9 zooms = 5 warps

 

Unit 1 Quiz#2

 

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.

d. Calculate Seymour's average velocity.

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.

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.

 

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 ...

  i.            velocity vector?

ii.            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.)

 

 

 

 

Unit 1 Quiz#3

Interpretting Graphs:

Consider the position vs. time graph below. The motion of five different people (A, B, C, D, and E) are shown on the graph. Study the graph and answer the following questions. Some questions may have more than or less than one answer.

Question:

  1. Which person(s) is/are moving with constant velocity?
  2. Which person(s) is/are moving in the positive direction?
  3. Which person(s) has/have a negative acceleration?
  4. Which person(s) change direction during the course of motion?

 

Consider the velocity vs. time graph below. The motion of five different people (A, B, C, D, and E) are shown on the graph. Study the graph and answer the following questions. Some questions may have more than or less than one answer.

Question:

  1. Which person(s) changes direction during the time of motion?
  2. Which person(s) is/are not moving?
  3. Which person has the greatest average speed?
  4. Which person(s) has/have a constant, positive acceleration value?
  5. Which person has the greatest magnitude of acceleration?

 

 

 

 

 

 

 

 

 

 

 

Mathematical Analysis of Graphs:

The graph below represents an object's motion for twenty seconds. Use the graph to answer questions 1 - 5.

  1. Use the graph to calculate the acceleration of the object at 6 seconds.  
  2. Use the graph to calculate the displacement of the car during the first 8 seconds.  
  3. Use the graph to calculate the displacement of the object from 8 to 16 seconds.  
  4. Use the graph to calculate the displacement of the object during the entire 20 second interval.  
  5. Use complete sentences and the language of physics to describe the motion of the object during the entire 20 seconds. (Do a "bang-up" job.)

 Miscellaneous Motion Problems:

  1. Interpret the information depicted by the position-time graph to construct a velocity-time graph for the same motion.

 

  1. Interpret the information depicted by the velocity-time graph to construct a position-time graph for the same motion.

 

  1. Noah Formula throws a ball upward with a velocity of +30 m/s. If the ball accelerates at a rate of 10 m/s2 (downwards), what is the velocity of the ball after 5 seconds? 
  2. Claire de Aisles is racing her shopping cart down the aisles of Jewel at +4 m/s for 3 seconds. Seeing a sale out of the corner of her eye, she skids to stop at a constant rate of -1 m/s2. Sketch a velocity-time graph for Claire's motion and calculate the distance which Claire de Aisles skids before coming to a complete stop.

 

Unit 1 Quiz#4

Interpretting Graphs:

Consider the velocity vs. time graph below for questions #1-5. The motion of five different people (A, B, C, D, and E) are shown on the graph. Study the graph and answer the following questions. Some questions may have more than or less than one answer. Place your answers in the blank.

  1. Which person(s) changes direction during the time of motion?
  2. Which person(s) is/are not moving?
  3. Which person(s) is moving with more than one speed during the course of its motion?
  4. Which person(s) has/have a constant, negative acceleration value?
  5. On average, which person has the greatest magnitude of acceleration?

 

 

 

6. Convert the following velocity-time plot to the corresponding position-time plot. Note there are three distinct parts to the motion.

 

7. Construct the motion diagram (i.e.,the "oil drop diagram") for the motion of the object depicted by the velocity-time graph in question #6.

 

8. Renatta Oyle is driving rightward (+ direction) at 30 m/s when she suddenly slows down at a constant rate of acceleration to a rest position in 5 seconds.

a.  Identify the direction of the acceleration of the car. ________________ Explain.

 

b.  Construct a motion diagram (i.e., an "oil drop diagram") of the car's motion during this braking period.

c.  Sketch plots of position vs. time and velocity vs. time for the car's motion during this braking period. If a plot should be a straight line, make it clearly straight; if it should be curved, make it clearly curved; etc.

Use your velocity-time plot to determine the displacement of the car during the 5 second braking period. Circle your answer.

9. Rex Things throws his mother's glass vase straight upward into the air with a velocity of 20 m/s, upward. The velocity-time plot is shown at the right.

a.  The vase travels upwards, reaches its peak and then falls back downwards. At what time does the vase reach the peak of its trajectory? t = ___________ s

b.  As the vase is moving upwards, it is slowing down. Therefore, its acceleration is _______________ (up or down).

c.      As the vase is moving downwards, it is speeding up. Therefore, its acceleration is _______________ (up or down).

d.  Use the velocity-time plot to determine the acceleration of the vase.

Kinematic Equations Quiz

A Chevrolet Corsica (m = 1220 kg; length = 4.6 m; a = -8.0 m/s2) is traveling 32.0 m/s. The Corsica is following closely behind a BMW (m = 1880 kg; length = 4.8 m; a = -8.0 m/s2). The BMW is traveling at the same speed. The distance between the centers of the two cars is 17.0 m. The BMW brakes and the driver of the Corsica requires 0.5 seconds to react (observe, decide, and execute). Use this information to answer the following questions.

1. Use kinematic equations to determine the distance that the BMW travels while braking to a stop.

 

2. Use kinematic equations to determine the distance that the Corsica travels before braking (i.e., in the 0.5 second of reaction time before the foot hits the brake pedal).

 

2.              Use kinematic equations to determine the distance that the Corsica travels while braking to a stop.

3.              Sketch graphs of velocity vs. time for the two cars. Using the graphs, calculate the total distance traveled by the two cars. Clearly show your work.

5.  Did a collision occur? Clearly explain.

Kinematic Equations Quiz#5

To receive full of partial credit, please show all your work. Write clearly and legibly. Show appropriate units on all answers. The following equations may be useful.

Equations:

 

1. Solve either 1 of the following two problems (A or B). Do not solve both. Cross out the problem which you do not want to be graded. If you do not clearly indicate which problem you are solving, then only Problem A will be graded. (5 pts. each)

Problem A: Miles Tugo is traveling along Lake Street at 25 ft/sec. Miles accelerates at -2.0 ft/sec2. Determine the distance traveled by Miles in 10.0 seconds.

 

 

Problem B: Two ants race across the entire length of the top of a Wheaties box at constant speed. The box is 34.0 cm long. One ant travels 4.6 cm/s and the other ant travels 3.5 cm/s. The fastest ant will cross the finish line first. How much time will pass between the time when the first ant crosses the finish line and when the second ant crosses the finish line?

 

 

2. Milton Yermouth is hurrying to his workplace at Chocolates, INC when he observes a multi-car pileup on the interstate. Milton is moving 33.0 m/s. His Acura Legend can accelerate at -8.5 m/s2. Determine Milton's braking distance while braking to a stop. Please show a clear and organized solution. (5 pts.)

3. The velocity-time graph portrays the motion of a 600-kg Yugo skidding to a stop. Use the graph to determine the distance which the Yugo travels while skidding. (3 pts)

 

4. Rex Things drops his mother's vase from a window on the top floor of the John Hancock building. Demonstrate your understanding of acceleration (g=10 m/s2, down) by filling in the table at the right. (2 pts)

 

Time

(s)

0

1.0

2.0

3.0

4.0

Velocity

(m/s)

0.0

_________

_________

_________

_________