what is force and friction
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The friction force is the force exerted by a surface as an object moves across it or makes an effort to move across it. There are at least two types of friction force - sliding and static friction. Though it is not always the case, the friction force often opposes the motion of an object.
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The push or pull on an object with mass that causes it to change its velocity.
Frictional force refers to the force generated by two surfaces that contacts and slide against each other.
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