Random
Acceleration
Speed
Graphing
Word Problems
100
What describes how velocity changes with time?
Acceleration
100
A change in velocity.
Acceleration
100
When an object is at rest, what is its speed?
0
100
On a speed-time graph, a perfectly straight horizontal line shows the change in speed is what?
0
100
You travel at a constant speed of 95 km/hour. What distance will you cover in 2 hours?
190 km
200
Motion is a change in ________
position
200
The acceleration of an object can be shown on a(n) ____________________ graph.
speed-time
200
What is the term for speed at any instant in time?
Instantaneous speed
200
When you graph the motion of an object, you put _______ on the horizontal axis and ________ on the vertical axis.
time, distance
200
Using V=d/t
A swimmer swims 20 m in 0.5 minutes. What is the swimmer’s average speed in m/s?
s = d/t = 20 m/30 s = 0.6667 s
300
What units are used for distance?
Meters
300
To describe velocity you need to know what two things?
speed and direction
300
Speed is the rate of change in what?
Distance
300
C.
300
v= d/t
Suppose that the average speed your dog can run is 2 m/s. How much time will it take your dog to run 120 m?
60 seconds or 1 minute
400
Which line segment is the fastest?
400
True of False: A car slowing down at a traffic light is accelerating.
True
400
Your mother picks you up at school, it takes 10 minutes for the 5 km drive home. What can you calculate a value for with the given information?
Average speed
400
What does the line represent?
Increasing speed
400
The acceleration of an object with an initial velocity of 15 mph and a final velocity of 45 mph in 30 minutes.
60 mph
500
The acceleration of an object with the initial velocity of 100 m/s and a final velocity of 20 in 60 seconds.
1.3 m/s/s
500
What are 3 ways to accelerate an object?
Speeding up, slowing down, or changing directions.
500
A soccer ball takes 20 s to roll 10m. What is the average speed of the soccer ball?
0.5 m/s
500
5 seconds
500
Using a=(Final velocity - initial velocity)/time
A top-fuel dragster accelerates from rest to velocity of 100 m/s in 8 s. What is the acceleration?
a = (vf - vl)/t = (100m/s - 0)/8 s = 12.5 m/s2