Vocabulary
Formula Questions
Motion
Random
True/False
100
The rate at which velocity changes is called the ________
Acceleration
100
Speed equals distance divided by _______
Time
100
When you know both the speed and direction of an object's motion, you know the ________
velocity
100
The steepness of a line on a graph is called the _____
Slope
100
It is best to use a moving reference point when determining motion
False, you should use a stationary reference point
200
What is the speed of an object at one instant in time?
Instantaneous speed
200
What is the SI unit for acceleration?
m/s^2
200
An object changing directions is an example of _______
Acceleration
200
On a graph showing distance-versus-time, a horizontal line represents an object that is __________ (moving at constant speed, increasing speed, not moving at all)
Not moving at all. A horizontal line would show an object at the same distance for a period of time, therefore, it is not moving.
200
If a two cars pass each other on the road going the same speed, they have the same velocity
False, they are going different directions, which means they have different velocities
300
What is a place or or object used for comparison to determine if an object is in motion?
Reference point
300
If you know a car traveled 300 kilometers in 3 hours, you can find its __________
Average speed, 100 km/h
300
If a car is speeding up, its initial speed is ____________(more or less) than its final speed
Less. The car is speeding up, which means its speed is increasing, so the car's initial speed would be less than its final speed.
300
If two lines appear on the same distance-versus-time graph, the line with the steeper _____________ indicates a greater speed
Slope
300
A straight diagonal line on a distance-versus-time graph indicates constant speed
True. The slope would be the same at each plotted point, thus making the speed constant.
400
What is the state in which one object's distance from another is changing?
Motion
400
A baseball pitcher stands on the mound with a baseball in his hand. He winds up, and throws the ball to the catcher. The ball traveled at 94mph and took .75 seconds to reach the catcher. What was the acceleration of the baseball?
94mph - 0mph / .75 sec = 125.33 mph/sec^2
400
A roller coaster is moving at 10m/s at the top of a hill and 22m/s at the bottom of the hill two seconds later. What is the acceleration of the roller coaster?
22m/s - 10m/s / 2seconds = 12m/s / 2seconds = 6m/s^2
400
What is the average speed of a car that travels 400 kilometers in 8 hours?
50 km/h
400
A person sitting on a ferris wheel going around in circles IS accelerating
True. The person is changing direction as they rotate, therefore, they are accelerating.
M
e
n
u