GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following is not an action at a distance force?
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Gravitational Force
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Electrical Force
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Magnetic Force
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Normal Force
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Explanation:
Detailed explanation-1: -Explanation: Frictional force is the answer because it works only when two bodies are in direct contact with each other.
Detailed explanation-2: -Out of the given options, only magnetic force acts at a distance. All others are contact forces.
Detailed explanation-3: -Frictional force works only when there is a physical contact ( no distance) between two bodies.
Detailed explanation-4: -The correct answer is Gravitation. In physics ‘action at a distance’ is the concept that an object can be moved, changed, or otherwise affected without being physically touched (as in mechanical contact) by another object. Gravity is also known as a force of attraction between two objects because of their mass.
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