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Forces are all around us, acting on all the objects.
The wheels on my wheelchair don't slip because of the contact force: friction. As they roll on the ground, friction acts in the opposite direction as I move, slowing the movement down.
Oh, no! My hat fell into the water! It's a good thing that the buoyant force is keeping it afloat. Buoyancy is a contact force that helps keep certain objects stay floating in water. Boy, am I happy that my hat wasn't weighed down!
We're playing volleyball! The ball is being pulled down by the noncontact force: gravity. It is dragged downward toward the center of the Earth. All objects have a gravitational attraction toward each other.
The chair I'm sitting on is able to push against the ground with the contact force: normal. All objects push against each other when not moving. The chair is able to support me, because the ground supports the chair.
Normal is a contact force
If I jumped on my bed, the contact force: spring would keep me bouncing. Spring allows objects to be stretched. When the object is released, it will propel forward. The springs in this bed can be pushed down, and they would keep me bouncing back and forth, until I stopped jumping.
The contact force: push of air is making the balloon go in the opposite direction. It is trying to navigate to the left, but the wind is pushing it with a greater force to the right.
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