Compare the motion of three motorboats. Which motorboat was moving at the highest speed?
a motorboat that moved 670kilometers west in 10hours a motorboat that moved 275kilometers south in 10hours a motorboat that moved 355kilometers north in 10hours
An object's speed tells you how fast the object is moving. Speed depends on both distance and time.
Distance tells you how far the object has moved. One unit used to measure distance is the kilometer.
Time tells you how long the object has spent moving. One unit used to measure time is the hour.
Think about objects moving for the same amount of time. The object that is moving the fastest will go the farthest distance in that time. It is moving at the highest speed.
Look at the distance each motorboat moved and the time it took to move that distance. The direction each motorboat moved does not affect its speed.
Notice that each motorboat moved for 10 hours. The motorboat that moved 670 kilometers moved the farthest distance in that time. So, that motorboat must have moved at the highest speed.