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Describing Acceleration - Section 9.1 Quiz
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A crash test dummy in a test facility moves on a rolling sled at +2.0 m/s. The rolling sled strikes a rubber barrier and shortly afterward is rolling backward at -1.8 m/s. When the crash test dummy in the sled strikes the rubber barrier, it experiences
negative acceleration.
positive acceleration.
uniform motion.
constant velocity.
If positive acceleration occurs in the same direction as an object's velocity, then that object is
speeding up.
moving at a uniform rate.
slowing down.
in constant motion.
When term describes the acceleration that is always opposite to the direction of motion?
Deceleration
Positive acceleration
Negative acceleration
Uniform acceleration
The following diagram depicts a car changing its velocity from -1.0 m/s to -4.0 m/s.
In this situation the car is
accelerating negatively.
decelerating.
accelerating positively.
not accelerating.
Spooch the kitten runs across the lawn at constant velocity until she notices an interesting bug sitting in the grass. She rapidly slows to a stop to check it out.
Which of the following statements regarding Spooch the kitten's motion is false?
Spooch experienced a change in speed but not velocity
Spooch deccelerated
Spooch experienced negative acceleration
Spooch's velocity changed
You are driving a car at 50 km/h as you approach a school zone. You then apply your brakes and slow down to 30 km/h. What is your change in velocity?
- 20 km/h
+ 20 km/h
+ 30 km/h
- 40 km/h
The following table represents the velocity of a boat. Consider motion to the east [E] to be positive (+) velocity.
Calculate the change in velocity of the boat between 10.0 s and 35.0 s.
- 1.0 m/s
- 12.0 m/s
- 25.0 m/s
+ 1.0 m/s
The following table represents the velocity of a boat. Consider motion to the east [E] to be positive (+) velocity.
Calculate the change in velocity of the boat between 5.0 s and 15.0 s.
+ 7.0 m/s
+ 16.0 m/s
- 7.0 m/s
+ 25.0 m/s
The following table represents the velocity of a boat. Consider motion to the east [E] to be positive (+) velocity.
At which time interval is the boat decelerating?
30.0 s to 35.0 s
15.0 s to 25.0 s
25.0 s to 30.0 s
0.0 s to 30.0 s
Which of the following pairs of descriptions could both be considered negative acceleration?
Decreasing speed going forward and increasing speed going backward
Decreasing speed going forward and decreasing speed going backward
Increasing speed going forward and increasing speed going backward
Increasing speed going forward and decreasing speed going backward