Each bus takes the same amount of time to stop. Which school bus needs a larger force to come to a stop?
a school bus carrying 500 pounds a school bus carrying 550 pounds
Kids from two different schools are riding their school buses home. The buses are the same. They are going the same speed. But different numbers of kids are riding in each bus.
A force is a push or a pull.
A force can make an object start moving or stop an object that is moving. A force can also make an object speed up, slow down, or change direction.
Forces can be different sizes.
Think about trying to move a heavy object and a light object. Imagine you want to move them at the same speed. You will need to use a larger force to move the heavy object.
Look for the school bus that is heavier.
A school bus carrying 550 pounds is heavier than a school bus carrying 500 pounds. So, the school bus carrying 550 pounds needs a larger force to come to a stop in the same amount of time as the other bus.