SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Resistance occurs because of magnetism
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resistance occurs due to irregularities on the surface of the objects
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resistance occurs because of sticky substances on the objects
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resistant occurs due to different densities of the objects
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Detailed explanation-1: -Irregularities on the two surfaces lock into one another. When we attempt to move any surface, we have to apply a force to overcome interlocking. On rough surfaces, there are a larger number of irregularities. So the force of friction is greater if a rough surface is involved.
Detailed explanation-2: -Friction is caused due to the irregularities on the two surfaces in contact. Even the smoothest surfaces have minute irregularities in them and these irregularities of the two surfaces interlock into each other and create friction. Larger the irregularities more is the friction.
Detailed explanation-3: -The correct answer is option 2, i.e., Interlocking. The interlocking of the irregularities present on the surfaces of the two objects results in static friction. The force resisting the relative motion between two surfaces is termed as Friction.
Detailed explanation-4: -Friction is caused due to the irregularities on the two surfaces in contact. So, when one object moves over the other, these irregularities on the surface get entangled, giving rise to friction.
Detailed explanation-5: -Friction occurs due to the roughness of the surfaces in contact. Even if the surface seem very smooth, it is not so at micro or nano scale. A microscope can reveal the roughness of a surface. A kind of interlocking occurs between the irregularities of the surfaces and hence a resistive force develops.