Chapter 3: Linear Motion

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Motion Quizzes & Trivia

Questions and Answers
  • 1. 
    The two measurements necessary for calculating average speed are
    • A. 

      Acceleration and time

    • B. 

      Velocity and time

    • C. 

      Distance and time

    • D. 

      Distance and acceleration

    • E. 

      Velocity and distance

  • 2. 
    A horse gallops a distance of 10 kilometers in a time of 30 minutes. Its average speed is
    • A. 

      15 km/h

    • B. 

      20 km/h

    • C. 

      30 km/h

    • D. 

      40 km/h

  • 3. 
    A car maintains a constant velocity of 100 km/hr for 10 seconds. During this interval its acceleration is
    • A. 

      Zero

    • B. 

      10 km/hr

    • C. 

      110 km/hr

    • D. 

      1000 km/hr

  • 4. 
    While an object near the Earth's surface is in free fall, its
    • A. 

      Velocity increases

    • B. 

      Acceleration increases

    • C. 

      Mass increases

    • D. 

      Mass decreases

  • 5. 
    A hockey puck is set in motion across a frozen pond. If ice friction and air resistance are neglected, the force required to keep the puck sliding at constant velocity is
    • A. 

      Zero

    • B. 

      Equal to its weight

    • C. 

      Equal to its weight divided by its mass

    • D. 

      Equal to the product of its mass times its weight

  • 6. 
    An object at rest near the surface of a distant planet starts to fall freely. If the acceleration there is twice that of the Earth, its speed one second later would be
    • A. 

      10 m/s

    • B. 

      20 m/s

    • C. 

      30 m/s

    • D. 

      40 m/s

  • 7. 
    If an object falling freely were somehow equipped with an odometer to measure the distance it travels, then the amount of distance it travels each succeeding second would be
    • A. 

      Constant

    • B. 

      Less and less each second

    • C. 

      Greater than the second before

    • D. 

      Doubled

  • 8. 
    If a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by about
    • A. 

      5 m/s

    • B. 

      10 m/s

    • C. 

      15 m/s

    • D. 

      A variable amount

    • E. 

      Depends on its initial speed

  • 9. 
    If a freely falling object were somehow equipped with a speedometer on a planet where the acceleration due to gravity is 20 m/s/s, then its speed reading would increase each second by
    • A. 

      10 m/s

    • B. 

      20 m/s

    • C. 

      30 m/s

    • D. 

      40 m/s

    • E. 

      Depends on its initial speed

  • 10. 
    Twelve seconds after starting from rest, an object falling freely will have a speed of
    • A. 

      10 m/s

    • B. 

      50 m/s

    • C. 

      100 m/s

    • D. 

      More than 100 m/s

  • 11. 
    If an object moves with constant acceleration, its velocity must
    • A. 

      Be constant also

    • B. 

      Change by the same amount each second

    • C. 

      Change by varying amounts depending on its speed

    • D. 

      Always decrease

  • 12. 
    If a car increases its velocity from zero to 60 km/h in 10 seconds, its acceleration is
    • A. 

      3 km/h/s

    • B. 

      6 km/h/s

    • C. 

      10 km/h/s

    • D. 

      60 km/h/s

    • E. 

      600 km/h/s

  • 13. 
    If a rocket initially at rest accelerates at a rate of 50 m/s2 for one minute, its speed will be
    • A. 

      50 m/s

    • B. 

      500 m/s

    • C. 

      3000 m/s

    • D. 

      3600 m/s

  • 14. 
    An apple falls from a tree and hits the ground 5 meters below. It hits the ground with a speed of about
    • A. 

      5 m/s

    • B. 

      10 m/s

    • C. 

      15 m/s

    • D. 

      20 m/s

    • E. 

      Not enough information given to estimate

  • 15. 
    It takes 6 seconds for a stone to fall to the bottom of a mine shaft. How deep is the shaft?
    • A. 

      About 60 m

    • B. 

      About 120 m

    • C. 

      About 180 m

    • D. 

      More than 200 m

  • 16. 
    In each second of fall, the distance a freely falling object will fall is
    • A. 

      About 5 m

    • B. 

      About 10 m

    • C. 

      The same, but not 5 m or 10 m

    • D. 

      Increasing

    • E. 

      None of these

  • 17. 
    A car accelerates at 2 meters/s/s. Assuming the car starts from rest, how far will it travel in 10 s?
    • A. 

      2 m

    • B. 

      10 m

    • C. 

      40 m

    • D. 

      100 m

    • E. 

      200 m

  • 18. 
    Drop a rock from a 5-m height and it accelerates at 10 m/s2 and strikes the ground 1 s later. Drop the same rock from a height of 2.5 m and its acceleration of fall is about
    • A. 

      Half as much

    • B. 

      The same amount

    • C. 

      Twice as much

    • D. 

      Four times as much

  • 19. 
    A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always
    • A. 

      In the direction of motion

    • B. 

      Opposite its velocity

    • C. 

      Directed upward

    • D. 

      Directed downward

  • 20. 
    While a car travels around a circular track at a constant speed, its
    • A. 

      Acceleration is zero

    • B. 

      Velocity is zero

    • C. 

      Inertia is zero

    • D. 

      None of the above

  • 21. 
    If a car accelerates from rest at 2 meters per second per second, its speed 3 seconds later will be about
    • A. 

      2 m/s

    • B. 

      3 m/s

    • C. 

      4 m/s

    • D. 

      6 m/s

  • 22. 
    A ball is thrown upwards and returns to the same position. Compared with its original speed after release, its speed when it returns is about
    • A. 

      Half as much

    • B. 

      The same

    • C. 

      Twice as much

    • D. 

      Four times as much

  • 23. 
    An object covers a distance of 8 meters in the first second of travel, another 8 meters during the next second, and 8 meters again during the third second. Its acceleration in meters per second per second is approximately
    • A. 

      0

    • B. 

      5

    • C. 

      8

    • D. 

      24

  • 24. 
    At one instant an object in free fall is moving downward at 50 meters per second. One second later its speed should be about
    • A. 

      25 m/s

    • B. 

      50 m/s

    • C. 

      55 m/s

    • D. 

      60 m/s

    • E. 

      100 m/s

  • 25. 
    At one instant a heavy object in air is moving upward at 50 meters per second. One second later its speed is approximately
    • A. 

      40 m/s

    • B. 

      50 m/s

    • C. 

      55 m/s

    • D. 

      60 m/s

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