Q:

What are contact forces?

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Quick Answer

Contact forces are those forces that cause a change in another object because the objects are physically touching one another, according to Reference.com. Examples of contact forces include applied force, tension force, air resistance force and normal force.

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Full Answer

In order for force to exist, interaction between two objects must take place. The interaction is sometimes as simple as one object sitting upon a surface. This is a type of contact force because the two objects are touching, and the surface exerts force on the object to support its weight. Contact force is one of the two general categories into which forces between two objects are defined. The other is force from a distance. Examples of this type of force are magnetic and gravitational.

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Related Questions

  • Q:

    How do you calculate normal force?

    A:

    To calculate the normal force on an object, draw a free body diagram, determine the surface's angle, factor in the other present forces, and solve for the normal force. Note that the normal force is perpendicular to the surface the object sits on.

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  • Q:

    What is the equation for the net external force?

    A:

    The equation for net external force is the sum of all the external forces applied to the object. For example, a compilation of common external forces is friction force, normal force, air resistance, tension and applied force. Because these are vectors, adding them together produces the correct total external force.

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  • Q:

    What is net force?

    A:

    A net force is the remaining force that produces any acceleration of an object when all opposing forces have been canceled out. Opposing forces decrease the effect of acceleration, lowering the net force of acceleration acting on an object.

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  • Q:

    What are examples of noncontact forces?

    A:

    Electricity, gravity and magnetism are all examples of non contact forces. A force is anything that can cause a physical change in an object.

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