Quiz  /  Machine Kinematics Class 12 MCQ Questions With Answers

  • 1. 
    Which graph shows a person jogging away at a constant pace?

  • A
  • B
  • C

  • 2. 
    How much time would it take for an object to fall 4.7 meters?

  • 0.959 s
  • 4.79 s
  • 0.979 s

  • 3. 
    A car is traveling at 21.0 m/s. It slows to a stop at a constant rate over 5.00 s. How far does the car travel during those 5.00 seconds before it stops?

  • 4.20 m
  • 52.5 m
  • 105 m
  • 158 m

  • 4. 
    What is the SI unit for acceleration?

  • m/s
  • m
  • m/s2
  • s

  • 5. 
    A roller coasters accelerates from an initial velocity of 6.0 m/s to a final velocity of 70 m/s over 4 seconds. What's the acceleration?

  • 24 m/s2
  • 18 m/s2
  • 16 m/s2
  • 16 m/s

  • 6. 
    What is the SI unit for speed and velocity?

  • Km
  • s
  • m/s
  • m/s2

  • 7. 
    The SI unit for length or distance is

  • foot (ft)
  • inch (in)
  • mile (mi)
  • meter (m)

  • 8. 
    If a car is traveling forward at 15 m/s, how fast will it be going in 1.2 seconds if the acceleration is -10 m/s2?

  • 27 m/s
  • 3 m/s
  • -27 m/s
  • -3 m/s

  • 9. 
    What happens to the velocity of a ball as it is dropped off a cliff?

  • It decreases at a uniform rate
  • It increases at a uniform rate
  • It is constant
  • It increases at a non-uniform rate

  • 10. 
    The speedometer on your car tells you

  • average velocity
  • instantaneous velocity
  • average speed
  • instantaneous speed

  • 11. 
    A ball is thrown downward from the top of a roof with a speed of 25 m/s. After 2 s, its velocity will be:

  • 19.6 m/s
  • -5.4 m/s
  • -44.6 m/s
  • 44.6 m/s

  • 12. 
    A change in velocity over time is known as:

  • acceleration
  • constant speed
  • average speed
  • displacement

  • 13. 
    An airplane lands on a runway with a velocity of 150 m/s. How far will it travel until it stops if its rate of deceleration is constant at -3 m/s2?

  • 525 m
  • 3750 m
  • 6235 m
  • 9813 m

  • 14. 
    The unit we use to measure acceleration is ___.

  • meters / second
  • meters
  • seconds
  • meters / second / second

  • 15. 
    A boat travels 12.0 m while it reduces its velocity from 9.5 m/s to 5.5 m/s. What is the magnitude of the boat’s acceleration while it travels the 12.0 m?

  • 1.3 m/s2
  • 2.5 m/s2
  • 3.0 m/s2
  • 7.5 m/s2

  • 16. 
    If a pinball machine launches a ball to a top speed of 25 m/s, with an acceleration of 15 m/s2 in a time of 0.40 seconds. What is the pinball's starting velocity (assume it is not zero)?

  • 19 m/s
  • 5 m/s
  • 22 m/s
  • 21 m/s

  • 17. 
    How can you change the acceleration of an object?

  • Speed the object up
  • Keep the object at a constant speed
  • Slow the object down
  • Change the object's direction

  • 18. 
    What does a horizontal line on a distance vs time graph tell us about the motion of the object?

  • Slowing down
  • Speeding up
  • Standing still
  • In free fall

  • 19. 
    A Frisbee is tossed from rest and reaches a top velocity of +54 m/s in 3.2 seconds. Determine the displacement of the Frisbee's motion.

  • -170 m
  • +76 m
  • +170 m
  • -76 m

  • 20. 
    Alexis is riding her bike around town. She travels 43.2 m to the right, and then turns around to bike an additional 30 m to the left. Determine the velocity of Alexis's bike ride if it takes her 39.4 seconds to complete her motion.

  • 2 m/s to the right
  • 2 m/s to the left
  • 0.3 m/s to the right
  • 0.3 m/s to the left

  • 21. 
    A ball is launched from a spring on the floor with an initial velocity of 32 m/s. It then comes to a stop in 4.3 seconds. Determine the acceleration of the ball.

  • +12 m/s2
  • -7.4 m/s2
  • -12 m/s2
  • +7.4 m/s2

  • 22. 
    What does a horizontal line on a velocity vs time graph tell us about the motion of an object?

  • Constant speed
  • Standing still
  • Slowing down
  • Speeding up

  • 23. 
    A jaguar takes 2.8 seconds to run 46.4 meters. Determine the jaguar's speed.

  • 0.060 m/s
  • 17 m/s
  • 44 m/s
  • -17 m/s

  • 24. 
    A sports car travels a distance of 450 meters while attaining a certain top speed. If the car's acceleration is 23 m/s2 after starting with a speed of 89 m/s, what would be the car's top speed?

  • 50 m/s
  • 150 m/s
  • 285 m/s
  • 170 m/s

  • 25. 
    Vionni is jogging at a speed of 1.9 m/s, when she hears about a sale at the local heladería (ice cream shop). Vionni accelerates at a rate of 0.20 m/s2 for the next 15 seconds until she arrives at the shop. Find Vionni's final velocity.

  • 4.9 m/s
  • 2.0 m/s
  • 7.3 m/s
  • 0.13 m/s

  • 26. 
    A roller coaster accelerates at a rate of 30.0 m/s2 from the station to reach a loop in 3.80 seconds. If starting from rest, how far did the roller coaster travel before it reaches the loop?

  • 217 m
  • 180 m
  • 110 m
  • 7.9 m

  • 27. 
    Imagine Mr. Gomez spinning a yo-yo in a circular motion with a constant speed. Would the yo-yo have an acceleration during its motion?

  • Yes; the displacement is changing, resulting in a changing acceleration
  • No; objects at a constant speed always have zero acceleration
  • No; acceleration does not apply to centripetal (circular) motion
  • Yes; the direction is constantly changing, which changes the acceleration

  • 28. 
    What does a constant velocity do tour our acceleration?

  • Acceleration increases
  • Acceleration decreases
  • Acceleration is zero
  • Acceleration is not affected by velocity

  • 29. 
    A chinchilla starts moving from rest and is accelerating at a rate of 1.3 m/s2 for 2.8 seconds. What is the chinchilla's final velocity?

  • 2.2 m/s
  • 0.45 m/s
  • 6.1 m/s
  • 3.6 m/s

  • 30. 
    What are our units for acceleration?

  • m
  • m/s2 or meters/second/second
  • N
  • m/s or meters/second
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