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Motion Test Study Guide
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Terms in this set (20)
The SI unit for length is?
Meter
What is the formula for speed?
Distance divided by time
A rider finishes a 10-km bicycle trip in 2 hours. What is the average speed of the rider?
5 km/hr.
A runner starts a 5-km race at 10:15 a.m. She finishes at 10:45 a.m. With this information you can calculate the runner's?
Average Speed
What does velocity tell?
Speed and Direction
How can you calculate the slope of a graph line by?
Dividing the rise by the run.
The rate at which velocity changes is called?
Acceleration
A car traveling at 25 m/s speeds up to 30 m/s over a period of 5 seconds. The average acceleration of the car is?
1 m/s
To find an object's acceleration, you need to know its starting speed, its ending speed, and?
Time
A flat line on speed-versus-time graph shows an object that is?
Not accelerating
An object is in motion if it is moving relative to a?
Reference point
Total distance traveled divided by the total time equals?
Average speed
What on a motion graph tells the rate of change?
The slope of a line
The rate at which an object is moving at a given instant of time is called?
Instantaneous speed
Increasing speed, decreasing speed, and changing direction are all?
Acceleration
True or False, an object is in motion if its distance from a reference point is changing.
True
True or False, to describe a velocity you need to know speed and direction.
True
True or False, if you know the instantaneous speed of an object, you also know its average speed.
False
True or False, an object cannot be accelerating if it is changing direction.
False
True or False, the SI unit of acceleration is meters per second.
False
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