Compare the motion of two runners. Which runner was moving at a lower speed?
a runner who moved 35miles in 5hours a runner who moved 25miles in 5hours
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 mile.
Time tells you how long the object has spent moving. One unit used to measure time is the hour.
Think about two objects moving for the same amount of time. The object that is moving slower will go a shorter distance in that time. It is moving at a lower speed.
Look at the distance each runner moved and the time it took to move that distance.
One runner moved 25 miles in 5 hours.
The other runner moved 35 miles in 5 hours.
Notice that each runner spent the same amount of time moving. The runner who moved 25 miles moved a shorter distance in that time. So, that runner must have moved at a lower speed.