Compare the motion of three cars. Which car was moving at the highest speed?
a car that moved 255miles west in 10hours a car that moved 270miles south in 10hours a car that moved 305miles 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 mile.
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 car moved and the time it took to move that distance. The direction each car moved does not affect its speed.
Notice that each car moved for 10 hours. The car that moved 305 miles moved the farthest distance in that time. So, that car must have moved at the highest speed.