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Forces, Motion, and Machines. A push or pull that is applied to an object. Force. The force that pulls objects toward the center of the Earth. gravity. Going from one place to another. a bus, train, and airplane are in motion when they move from one place to another. Motion.
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a bus, train, and airplane are in motion when they move from one place to another Motion
A force that stops motion and happens between two surfaces that touch
It is easier to walk on a dry surface than it is on ice Friction
Resistance by friction from air or water moving over a surface
Boats and planes are narrow. As they move, friction holds them back from moving faster. drag