Forces are ____ or ____ . Forces can make an object ____ moving, or ____ moving. If we kick a football, we are pushing it because it moves ____ . If we drag a suitcase along behind us we are pulling it because we are moving it ____ . ____ is the force that pushes against the movement, slowing it down. If a car is rolled down a hill made of ____ , it would have more friction than if the hill was made of ____ .

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