quiz Ch1lesson2
  • 1. To specify the position of an object, you need to know
A) its motion
B) a reference point
C) a unit of measurement
D) its speed
  • 2. Latitude and longitude measure
A) direction
B) speed
C) position
D) motion
  • 3. A person on a moving train sees a car that appears to be stopped. A person outside the train sees both the car and the
A) changing speed
B) measurement of distance
C) relative motion
D) a unit of measurement
  • 4. Which tells you how quickly an object changes position?
A) direction
B) \speed
C) relative motion
D) observation
  • 5. To find the speed of an object in motion, you need to measure
A) time and velocity
B) distance and direction
C) distance and time
D) time and direction
  • 6. Which of these formulas shows the relationship among speed, time, and distance?
A) t = Sd
B) S = td
C) S = d / t
D) S = t + d
  • 7. One example of a vector is
A) distance
B) speed
C) velocity
D) position
  • 8. A flat, or horizontal, line on a distance-time graph means that the speed is
A) increasing
B) decreasing
C) zero
D) higher than average
  • 9. The change in velocity over time is called acceleration.
A) True
B) False
  • 10. When the acceleration of an object is in the same direction as its motion, the speed of the object decreases.
A) False / in the opposite direction of
B) True
  • 11. To calculate acceleration, you need to know both the final velocity and the initial velocity of an object.
A) False
B) True
  • 12. An airplane coming to a stop after landing has positive acceleration.
A) True
B) False / negative
  • 13. A flat line on a velocity-time graph shows an interval in which the velocity is zero.
A) True
B) False / acceleration
  • 14. Motion is a change in
A) velocity over time
B) position over time
C) speed over time
D) acceleration over time
  • 15. Jenna knows that a friend runs 100 m in 8 s. She could use this to calculate her friend's
A) speed
B) motion
C) position
D) acceleration
  • 16. Dan sits in a moving car. As he looks out the window, another car is right next to his. When he looks again, the other
A) The other car is parked.
B) The other car is moving with the same speed as Dan's car.
C) The other car is moving slower than Dan's car.
D) The other car is moving faster than Dan's car
  • 17. Jake walks 100 m in 50 s, moving at different speeds. Dividing 100 m by 50 s gives you Jake's
A) velocity
B) average speed
C) acceleration
D) direction
  • 18. Elena is riding her bicycle. She begins pedaling harder. What do you predict will happen?
A) Her speed will increase.
B) Her acceleration will decrease.
C) Her velocity will decrease.
D) Her position will not change.
  • 19. Speed in a specific direction is
A) distance
B) position
C) acceleration
D) velocity
  • 20. Sara walked north at 100 m/s. Han had a different velocity but the same speed. He could have walked
A) north at 200 m/s
B) west at 100 m/s
C) north at 100 m/s
D) south at 50 m/s
  • 21. Jess drives at a steady velocity. Her acceleration is
A) at a right angle to her motion
B) in the same direction as her motion
C) opposite to her motion
D) equal to zero
  • 22. Acceleration measures a change in
A) direction
B) location
C) velocity
D) position
  • 23. On a velocity-time graph, a line that is slanted down from left to right shows
A) steady acceleration
B) positive acceleration
C) zero acceleration
D) negative acceleration
  • 24. A change of position over time is called
A) acceleration
B) motion
C) distance
D) location
  • 25. Lisa is watching a friend run a race. What does she need to know to find her friend's speed?
A) time and motion
B) distance and position
C) position and motion
D) distance and time
  • 26. Drew watches a car that appears to be moving forward. Which of the following could be true?
A) Drew is in another car moving backward.
B) The other car is moving sideways with respect to Drew.
C) The other car is moving backward relative to Drew.
D) Drew is in a car moving forward relative to the other car.
  • 27. Callie walked 18 m in 12 s. She did not walk at a steady speed, so 1.5 m/s was her
A) average speed
B) direction
C) velocity
D) acceleration
  • 28. A ball is rolling in a straight line. Marcus kicks the ball at a 90-degree angle. What do you predict will happen?
A) The direction of motion of the ball will change.
B) The speed of the ball will increase.
C) The velocity of the ball will not change
D) The ball will stop moving.
  • 29. Velocity is different from speed because velocity also includes
A) acceleration
B) distance
C) direction
D) motion
  • 30. Martin walks one mile west. Maya walks one mile east in the same amount of time. They have
A) different velocities
B) the same velocity
C) different average speeds
D) the same motion
  • 31. Which is an example of zero acceleration?
A) a person walking on a treadmill at a steady rate
B) a school bus coming to a stop
C) an ice hockey player turning around
D) an airplane speeding up along a runway
  • 32. If you subtract an object's final velocity from its initial velocity and divide by the time it took to change velocity, you
A) position
B) velocity
C) instantaneous speed
D) acceleration
  • 33. Adam started riding his bicycle to a friend's house at a velocity of 4 m/s west. As he neared the house, his velocity
A) zero acceleration
B) positive acceleration
C) steady speed
D) negative acceleration
  • 34. A person measuring motion needs to observe an object's
A) size and direction at different times
B) size and direction once
C) position at different times
D) position once
  • 35. Rosa wants to determine how long it will take her to drive from her house to her grandmother's house 5 km away.
A) average speed
B) motion
C) position
D) acceleration
  • 36. Greg thinks the car he is in is stopped, and the car next to him is rolling backward. What else might be happening?
A) Greg's car is rolling backward while the other car is stopped
B) Both cars are rolling forward, but Greg's car is rolling forward faster.
C) Both cars are rolling backward, but Greg's car is rolling backward faster.
D) The other car is rolling forward while Greg's car is stopped.
  • 37. Michael jogged 200 m in 25 seconds and then 100 m in 15 seconds. He could find his average speed by dividing
A) 100 m by 15 s
B) 300 m by 40 s
C) 200 m by 40 s
D) 300 m by 25 s
  • 38. Melanie is accelerating as she skates on the ice. However, the speed at which she is skating has not changed. A
A) has reached the top speed at which she can skate
B) is skating in a straight line
C) is skating in a wide circle
D) has stopped skating and is now standing still
  • 39. Roger observed an airplane flying overhead. He measured its speed and noted that it moved from north to south.
A) velocity
B) acceleration
C) distance
D) position
  • 40. Chen rode his bicycle north with a speed of 20 m/s. Olivia rode her bicycle with the opposite velocity. She rode
A) south at 20 m/s
B) south at 10 m/s
C) east at 20 m/s
D) north at 10 m/s
  • 41. On a roller coaster, the cars first climb a hill at a decreasing speed. Then the cars speed up as they go down the hill,
A) climbing the hill
B) descending the hill
C) near the end of the track
D) coasting on the straight track
  • 42. The formula for calculating acceleration is
A) a = (vfinal - vinitial)
B) a = (vfinal + vinitial ) / t
C) a = (vfinal - vinitial ) / t
D) a = (vfinal + vinitial)
  • 43. An object's distance-time graph shows that it moves 10 m during the first 10 s and moves an additional 5 m during
A) positive acceleration
B) no acceleration
C) negative acceleration
D) no velocity
  • 44. Suppose that you look out the window of a moving train at a stopped car.The car appears to you to move backwards. How would the motion of a train appear to someone in the car? Why?
  • 45. How can you determine speed from a distance-time graph?
  • 46. Describe the acceleration Milo experiences if he speedds up the first half of a race and slows down the second half of the race.
  • 47. Emily rides a bicycle around a circular track, and Abby rides on a straight track. Abbly's speed increases and Emily's speed stays the same. Using the terms velocity and direction, describe each girl's acceleration.
  • 48. Micah and Will watched a skater skate at a steady speed around an oval rink. Micah said that the skater had no acceleration. Will said that the skater was accelerating. Who is right? Explain why.Be sure to describe how the skater's motion and velocity change.
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