Question : Which of the following is not a non-contact force?
Option 1: Gravitational
Option 2: Electrostatic
Option 3: Friction
Option 4: Magnetic
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Correct Answer: Friction
Solution : The correct option is Friction .
Friction is not a non-contact force. Gravitational, electrostatic, and magnetic forces are non-contact because they can act at a distance without direct physical contact between the objects. Friction is a contact force that opposes the relative motion or tendency of such motion between two surfaces in contact.
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