A Force That Opposes Motion?

Answer

The force that opposes motion between two surfaces is known as friction. Friction can only occur when the two bodies are moving in contact with each other. In addition, the term can also be used to refer to a clash or state of conflict between people.
Q&A Related to "A Force That Opposes Motion?"
friction
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Friction is the force that opposes motion, unless otherwise noted. ChaCha!!
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if two surfaces are in contact - (kinetic) friction. if it is an object moving through a fluid (e.g. air) - aerodynamic drag cheers edit: oooh "resistance" is a good one
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There is a certain amount of radioactive material in the Earth's interior, which generates heat as it decays. This heat is not evenly distributed, which results in convection currents
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