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the video

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Factors affecting Friction | Frictional Force | Physics | Don't Memorise

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Forces can be described as a push or pull on an object. They can be due to phenomena such as gravity, magnetism, or anything that might cause a mass to accelerate.

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Sir Isaac Newton discovered force.

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Frictional Force refers to the force generated by two surfaces that contacts and slide against each other. These forces are mainly affected by the surface texture and amount of force impelling them together. The angle and position of the object affect the amount of frictional force If an object is placed flat against an object, then the frictional force will be equal to the weight of the object.
If an object is pushed against the surface, then the frictional force will be increased and becomes more than the weight of the object.

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Factors affecting Friction | Frictional Force | Physics | Don't Memorise