Name
Date
Pd
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Calculating Speed
Average Speed =
Solve the speed equation for distance.
Distance =
d=st
s = d/t
Solve the speed equation for time.
Time =
t=d/s
Using Math Practice
What is the average speed of a cheetah that runs 140 meters in 5 seconds?
1.
2.
3.
4.
5.
6.
Steps to Solve:
Write the known variables.
Write the unknown variables.
Write the equation needed.
Plug and chug.
Write answer in a complete sentence.
Check for sense and units.
What is the average speed of a cheetah that runs 140 meters in 5 seconds?
Steps to Solve:
1. Write the known variables. 2. Write the unknown variables. 3. Write the equation needed. 4. Plug and chug.
d = 140 meters
t = 5 seconds
s= ?
s = d/t
s= 140 m
5s
s= 28 m/s
5. Write answer in a complete sentence.
The average speed of a cheetah is
28 m/s.
6. Check for sense and units!
More Using Math Practice
1. Charlie can get to the Red Box to drop off his rented video in 10 minutes.
The Red Box is 5 kilometers away. What is Charlie’s average speed?
1. Write the known variables. 2. Write the unknown variables. 3. Write the equation needed. 4. Plug and chug.
d=
t=
v=
v = d/t
5. Write answer in a complete sentence.
Charlie’s average speed is
6. Check for sense and units!
.
2. A rabbit travels an average speed of 0.32 meters per second. What is the distance
the rabbit traveled if 14,400 seconds have past?
1. Write the known variables. 2. Write the unknown variables. 3. Write the equation needed. 4. Plug and chug.
v=
t=
d=
5. Write answer in a complete sentence.
The rabbit traveled a distance of
.
6. Check for sense and units!
3. A baby crawled from the couch to reach a toy that was 200 centimeters away. His
average speed was 40 cm/s. How many seconds did it take the baby to crawl to the toy?
Did you remember to write all 6 six steps? If not, go back and do so!
Complete Speed and Distance Practice Problems A