This week of Physics, we have been introduced to "force". Force is a push or pull. There are two types of force: contact, and at a distance. Contact force is a force that uses a physical contact between objects. For example, if I push my chair across the room, I am providing a contact force because there's physical contact between me and the chair. The other type of force, at a distance, is a force that has no contact. One of the most obvious at a distance forces is gravity. So, going back to the chair. I am providing physical force, but that's not the only force that is acting upon it. Gravity is also there acting upon it, pulling it down to the ground and keeping the chair from floating all over the place.
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