Compare the motion of two mountain bikers. Which mountain biker was moving at a higher speed?
a mountain biker who moved 190kilometers in 10hours a mountain biker who moved 255kilometers 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 two objects moving for the same amount of time. The object that is moving faster will go a farther distance in that time. It is moving at a higher speed.
Look at the distance each mountain biker moved and the time it took to move that distance.
One mountain biker moved 255 kilometers in 10 hours.
The other mountain biker moved 190 kilometers in 10 hours.
Notice that each mountain biker spent the same amount of time moving. The mountain biker who moved 255 kilometers moved a farther distance in that time. So, that mountain biker must have moved at a higher speed.