Physics Quiz: Speed And Acceleration Practice Test!

20 Questions | Total Attempts: 394

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Physics Quiz: Speed And Acceleration Practice Test!

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Questions and Answers
  • 1. 
    A car goes from 30 miles per hour (mph) to 60 mph in six seconds. The acceleration of the car is:  
    • A. 

      5 mph per second.

    • B. 

      6 mph per second.

    • C. 

      30 mph per second.

    • D. 

      180 mph per second.

  • 2. 
    The graph below represents the speed of a car vs. time. Figure 4-1 Which point on the speed versus time graph in Figure 4-1 has the highest acceleration?  
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 3. 
    A rocket has an acceleration of 50 m/sec2. How long does it take the rocket to reach a speed of 1,000 m/sec?  
    • A. 

      .05 seconds

    • B. 

      20 seconds

    • C. 

      50 seconds

    • D. 

      50,000 seconds

  • 4. 
    A sports car reaches a speed of 50 m/sec in 12 seconds after starting from rest. The acceleration of the car is:     
    • A. 

      0.24 m/sec^2

    • B. 

      4.17 m/sec^2

    • C. 

      38 m/sec^2

    • D. 

      50 m/sec^2

  • 5. 
    The graph below represents the motion of an object. Figure 4-2 Between two and three seconds, the speed of the object shown in Figure 4-2:  
    • A. 

      Is approximately 1.33 m/sec

    • B. 

      Is approximately 3 m/sec

    • C. 

      Increases from 1 m/sec to 4 m/sec

    • D. 

      Increases from rest to 4 m/sec

  • 6. 
    Which of the following statements CANNOT ever be true?  
    • A. 

      An object can have a speed of zero and an acceleration that is not zero.

    • B. 

      An object can have an acceleration of zero and a speed that is not zero.

    • C. 

      An object can have a speed that is changing and still have zero acceleration.

    • D. 

      An object can have a speed that is decreasing and still have acceleration.\x00

  • 7. 
    In the equation , the variable x0 represents:  
    • A. 

      The position at time t = 0.

    • B. 

      The distance moved in the first second of motion.

    • C. 

      The speed at time t = 0.

    • D. 

      The position when the speed (v) equals zero.

  • 8. 
    The graph below represents the motion of a moving object. Figure 4-3 The initial speed (v0) shown in Figure 4-3 is:  
    • A. 

      0.0 m/sec.

    • B. 

      0.2 m/sec.

    • C. 

      0.4 m/sec.

    • D. 

      2.0 m/sec.

  • 9. 
    A car is traveling at 30 m/sec in a straight line. The driver applies the brakes for 3 seconds, and the car slows down to 12 m/sec. The acceleration of the car is:  
    • A. 

      -3 m/sec^2

    • B. 

      -4 m/sec^2

    • C. 

      -6 m/sec^2

    • D. 

      -10 m/sec^2

  • 10. 
    If the speed is constant, which variable is zero in the equation ?
    • A. 

      X0

    • B. 

      V0

    • C. 

      A

    • D. 

      T

  • 11. 
    An object falls for 2 seconds after being dropped from rest. Its speed is approximately:  
    • A. 

      2 m/sec

    • B. 

      4.9 m/sec

    • C. 

      9.8 m/sec

    • D. 

      19.6 m/sec

  • 12. 
    A object is thrown straight upwards with a speed of 19.6 m/sec. Three seconds later, its speed is:  
    • A. 

      Zero

    • B. 

      9.8 m/sec downward

    • C. 

      49 m/sec upward

    • D. 

      29.4 m/sec downward

  • 13. 
    The acceleration of gravity on the moon is about 1.6 m/sec2. A 2-kilogram object on the moon is dropped from rest. After ten seconds, the speed of the object is:  
    • A. 

      1.6 m/sec

    • B. 

      3.2 m/sec

    • C. 

      16 m/sec

    • D. 

      32 m/sec

  • 14. 
    In physics, the term free fall means:  
    • A. 

      No forces act on the object except gravity.

    • B. 

      The speed of a falling object remains constant.

    • C. 

      The object is dropped from an initial speed of zero.

    • D. 

      The object is dropped straight down.

  • 15. 
    The acceleration of gravity on the moon is about 1.6 m/sec2. An experiment to test gravity compares the time it takes objects to reach a speed of 10 m/sec after being dropped from rest. How long does an object dropped on the moon have to fall compared to an object dropped on Earth?  
    • A. 

      1.6 times as long

    • B. 

      6.1 times as long

    • C. 

      9.8 times as long

    • D. 

      15.7 times as long

  • 16. 
    The acceleration of gravity expressed in English units is: a.    9.8 ft/min2.     b.    32.2 ft/sec2.     c.    9.8 ft/sec2.     d.    3.0 ft/sec2.   
    • A. 

      9.8 ft/min^2

    • B. 

      32.2 ft/sec^2

    • C. 

      9.8 ft/sec^2

    • D. 

      3.0 ft/sec^2

  • 17. 
    A clever person who knows physics measures the depth of a deep hole by dropping a rock into the hole. The rock takes 3.2 seconds to hit the bottom. The depth of the hole is approximately:   
    • A. 

      16 meters

    • B. 

      31 meters

    • C. 

      50 meters

    • D. 

      100 meters

  • 18. 
    An arrow is shot straight up into the air at a speed of 98 m/sec. What is the maximum height reached by the arrow? You may neglect air friction.  
    • A. 

      98 meters

    • B. 

      490 meters

    • C. 

      980 meters

    • D. 

      1,470 meters

  • 19. 
    A stone is dropped from the roof of a tall building. A person measures the speed of the stone to be 49 m/sec when it hits the ground. The height of the building is closest to:  
    • A. 

      24 meters

    • B. 

      49 meters

    • C. 

      122 meters

    • D. 

      245 meters

  • 20. 
    A bolt falls off an airplane high above the ground. How far does the bolt have to fall before its speed reaches 100 m/sec (about 200 miles per hour)? You should ignore air friction in your calculation. (HINT: Calculate time, then calculate distance).  You can work this on a piece of paper and turn it in with the test