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# What is a retarding force?

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When a force is applied to an object resting on a surface, a retarding force is that which opposes the force being applied to the object. A retarding force is usually that of friction, which must be overcome when moving an object resting on a surface. If the object is being moved upward along an inclined plane, gravity represents an additional force that must be overcome.

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The retarding force represented by friction can take on various forms. Dry friction refers to the retarding force existing between two solid surfaces in contact with each other. Skin friction, also known as drag, represents the force offering resistance to a fluid moving across the surface area of a body.

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## Related Questions

• A:

In physics, energy is a system's capacity to perform work, which is force acting on an object. Energy has many forms, including kinetic or mechanical energy, potential energy, light energy and heat energy. The basic rules for understanding energy are the laws of thermodynamics.

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• A:

The equation for determining the net force acting on an object is F = ma, or force equals mass times acceleration. Net force is measured in terms of acceleration, which means a change in velocity. If there is no change in velocity, the net force is considered to be zero.

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• 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.