What does friction cause to the screws, ball bearings and soles of the shoes?
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A.
Friction has no effect on these
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B.
Friction protects all these
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C.
Friction avoids all the damages that could be caused to these due to other forces.
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D.
Friction wears out these materials and damages them
Correct Answer:
D. Friction wears out these materials and damages them
Explanation:
Friction is the force that resists the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. When screws, ball bearings, and the soles of shoes interact with other surfaces, the resulting friction generates heat and physical stress. Over time, this mechanical interaction leads to the gradual wearing away of the material, causing thinning, loss of grip, or structural degradation. Consequently, these components eventually become damaged or ineffective and require replacement. Therefore, friction is responsible for the wear and tear observed in these materials.
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