Types of contact force: Frictional Force: Friction is a force exerted by a surface against the motion of a body across its surface. Friction is a type of contact force only. Applied Force: Force which is applied to an object by another object. Applied force may be contact force as well as non – contact force. Normal Force: The normal force is also called Support force. The normal force is the support force exerted upon an object that is in contact with another fixed or stable object.
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