Q:

What factors affect friction?

A:

Quick Answer

Friction is caused by the interactions between the sometimes microscopic roughness of different substances. As a result, friction is primarily affected by the "roughness" of an object. Friction is also affected by the mass or weight of the object as well.

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Full Answer

Frictional force is proportional to the normal force on an object. To understand the normal force it is important to consider that all forces have an equal and opposite force. In other words, when an object sits on the ground, gravity acts on the object, the object pushes against the ground, and the ground pushes back up. Heavier objects have more friction. Rougher objects also have more surface area. This means that there are more opportunities for the surface to interact with whatever it is rubbing against.

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Related Questions

  • Q:

    What is harmful friction?

    A:

    Harmful friction is when the resistance of one body moving across another brings injury or undesirable results, according to Reference.com. All harmful friction does not necessarily involve injury.

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  • Q:

    What is charging by friction?

    A:

    Charging by friction involves rubbing two different materials together that have different pulls towards electrons, so that one material will pull away electrons when the materials are separated and both will become charged. A common example of charging by friction is rubbing a balloon against hair.

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  • Q:

    What would happen if there was no friction?

    A:

    Without friction, energy transfer would be easier and stopping motion would be more difficult. If there was no friction, there would be no force slowing down motion when two objects rubbed against one another.

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  • Q:

    What are the advantages and disadvantages of friction?

    A:

    Friction is the reason humans are able to control where they move or why objects can stay in one place, but it is also the reason we must use force and lose energy to move objects and why many materials wear out and break. The reality of friction allows machines to work, humans to walk and cars to drive. However, friction also means that energy needs to constantly be exerted to move any object.

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