what is the difference between contact and non contact force ? Give one example of each of them.
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When there is a physical contact between the two bodies exerting force, it is known as contact force whereas when there is no physical contact between the two bodies exerting force, it is known as non-contact force. Lifting a bag is a contact force as there is a contact between our hands and the bag. Magnetic force is a non-contact force.
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A non-contact force is a force which acts on an object without coming physically in contact with it. The most familiar example of a non-contact force is gravity, which confers weight. In contrast a contact force is a force applied to a body by another body that is in contact with it.
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