Unit 3, Lesson 9
More about Constant Speed
Grade 6
9.2
Activity
A young camel in Town A is traveling on a flat desert trail to Town B, which is 24 miles away. An older camel in Town B is traveling on the same trail to Town A.
The two camels depart at the same time.
The young camel walks at a speed of 3.4 miles per hour while the older camel walks 3 miles per hour.
For each question, explain or show your reasoning.
- How far apart will they be in 0, 1, 2, and 3 hours? Complete the first four rows of the table.
elapsed time (hours) distance apart (miles) 0 1 2 3 - How much time after their departure will the camels meet? (You can use the empty rows in the table if you think it’d be helpful.)
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The next day, the older camel travels back to Town B at 6.4 miles per hour. The young camel stays in Town B.
Here are three statements about this situation. Do you agree with each statement? Explain or show your reasoning.
- The two camels will be the same distances apart after 0, 1, 2, and 3 hours as they were the day before.
- The camels will meet the same amount of time after departure as they did the day before.
- The camels will meet at the same point along the trail as they did the day before.
Pace is one way to describe how fast something moves. Pace tells how much time it takes the object to travel a certain distance.
For example, Diego runs at a pace of 10 minutes per mile. Elena runs at a pace of 11 minutes per mile. Elena runs slower than Diego, because it takes her more time to travel the same distance.
Speed is one way to describe how fast something moves. Speed tells how much distance the object travels in a certain amount of time.
For example, Tyler walks at a speed of 4 miles per hour. Priya walks at a speed of 5 miles per hour. Priya walks faster than Tyler, because she travels more distance in the same amount of time.