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Acceleration ( Assignment ) (1
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Acceleration ( Assignment )Which scenario involves acceleration? - ANS-Answer: ✔ a car decreasing its speed due to a
red light
A merry-go-round moves in a circle at a constant speed. Is the merry-go-round accelerating?
Explain your answer. - ANS-Answer: ✔ Yes, because when a circular object rolls it begins to
accelerate, but it also slows down at some point. for example, if a person pushes a barrel on a
flat surface it will speed up as it goes, but it will soon slow down and stop.
Identifying Positive and Negative Acceleration
Which section (A or B) of the roller coaster shows positive acceleration? ___________ ?
Which section (A or B) of the roller coaster shows negative acceleration? ___________ ? -
ANS-Answer: ✔ A
✔B
A helicopter's speed increases from 30 m/s to 40 m/s in 5 seconds.
What is the acceleration of this helicopter? ___________ m/s2 ? - ANS-Answer: ✔ 2
A car traveling at a speed of 24 m/s comes to a stop at a red light.
How much time will it take for the car to stop if its acceleration is -8.0 m/s2? - ANS-Answer: ✔ 3
s
The graph shows the motion of a car. Which segments show that the car is accelerating? Select
three options. - ANS-Answer: ✔ A
✔C
✔E
The graph shows the motion of a car. Which segment shows that the car is slowing down? -
ANS-Answer: ✔ C
What is the initial velocity of the object represented by the graph? ___________ m/s ? -
ANS-Answer: ✔ 5
Maia says that both lines on this position vs time graph show acceleration. Is she correct? Why
or why not? - ANS-Answer: ✔ -30 m/s2
What is the acceleration of the car at segment C? - ANS-Answer: ✔ Maia is not correct
because a straight line moving upwards on a position vs time graph has a constant slope, so it
represents constant velocity. No change in velocity means no acceleration is taking place.
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