Compare the motion of two sailboats. Which sailboat was moving at a higher speed?
a sailboat that moved 75kilometers in 5hours a sailboat that moved 90kilometers 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 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 sailboat moved and the time it took to move that distance.
One sailboat moved 90 kilometers in 5 hours.
The other sailboat moved 75 kilometers in 5 hours.
Notice that each sailboat spent the same amount of time moving. The sailboat that moved 90 kilometers moved a farther distance in that time. So, that sailboat must have moved at a higher speed.