Which one of the following is an example of a contact force?

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Electrostatic force

Friction

Magnetic force

Gravitational force

answer is B.

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Detailed Solution

Friction is an example of a contact force.
Friction is a kind of force that comes into action when the body is in contact with another surface. Friction depends on the mass of the object and the nature of surfaces in contact. Thus, the answer is friction.
Contact forces cause the change of state of an object by touching it, while in non-contact force, there is no physical touch between the objects. Magnetic force. Gravitational force and electrostatic force are examples of ‘non-contact’ force.

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