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What is an object’s speed?
- Response: the distance a moving object travels in a known amount of time
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What is the equation used to calculate a moving object’s average speed?
- Response: average speed = total distance traveled ÷ total time traveled
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What is the average speed, in meters per second, m/s, of a runner who records three different distances over three separate time periods of 30 seconds: 180 meters, 188 meters, and 190 meters?
- Response: 18.6 m/s
- Calculation: Total distance = 180 + 188 + 190 = 558 meters Total time = 3 * 30 = 90 seconds Average speed = 558 m ÷ 90 s = 6.2 m/s
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A group of cyclists take a road trip. They travel 5 km in 25 minutes to reach the edge of town. Once out of town, they travel the next 5 km in 15 minutes. What was the average speed of this trip?
- Response: 0.25 km/min
- Calculation: Total distance = 5 km + 5 km = 10 km Total time = 25 min + 15 min = 40 min Average speed = Total distance ÷ Total time = 10 km ÷ 40 min = 0.25 km/min
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In a science experiment, a student releases a ball down a 3 m ramp. If the ball has an average speed of 3 m/s, which of the following must be true?
- Response: At a certain point, the ball traveled faster than 3 m/s.
- Explanation: Average speed does not necessarily mean the object traveled at that speed at all times; it can vary throughout the motion.
What is an object’s speed?(1 point)
Responses
the change in position of a moving object over a known amount of time
the change in position of a moving object over a known amount of time
the distance a moving object travels in a known amount of time
the distance a moving object travels in a known amount of time
the length of the path an object takes as it moves from one location to another
the length of the path an object takes as it moves from one location to another
the change in position of a moving object, both its distance between two points and its direction
What is the equation used to calculate a moving object’s average speed?(1 point)
Responses
average speed = total distance traveled ÷
total time traveled
average speed = total distance traveled divided by total time traveled
average speed = total time traveled ×
total distance traveled
average speed = total time traveled times total distance traveled
average speed = highest speed ÷
total time
average speed = highest speed divided by total time
average speed = highest speed −
lowest speed
What is the average speed, in meters per second, m/s, of a runner who records three different distances over three separate time periods of 30 seconds: 180 meters, 188 meters, and 190 meters?(1 point)
Responses
468 m/s
468 m/s
18.6 m/s
18.6 m/s
6.2 m/s
6.2 m/s
4.1 seconds
A group of cyclists take a road trip. They travel 5 km in 25 minutes to reach the edge of town. Once out of town, they travel the next 5 km in 15 minutes. What was the average speed of this trip?(1 point)
Responses
0.2 km/min
0.2 km/min
0.25 km/min
0.25 km/min
0.125 km/min
0.125 km/min
0.33 km/min
In a science experiment, a student releases a ball down a 3 m ramp. If the ball has an average speed of 3 m/s, which of the following must be true?(1 point)
Responses
The ball never went faster than 3 m/s.
The ball never went faster than 3 m/s.
It took the ball 3 s to reach the halfway point down the ramp.
It took the ball 3 s to reach the halfway point down the ramp.
The ball traveled at a constant speed of 3 m/s.
The ball traveled at a constant speed of 3 m/s.
At a certain point, the ball traveled faster than 3 m/s.
1 answer