Correct Answer - Option 2 : Rolling friction
The correct answer is option 2) i.e. Rolling friction
CONCEPT:
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Friction: The frictional force is a force that opposes the relative motion of an object. The force acts when two surfaces in contact are moving past one another or when one surface is moving past a stationary surface.
- Friction is caused due to irregularities on the surface. The irregularities on surfaces get interlocked and thus prevents their tendency to move.
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Types of friction:
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Static friction is defined as the frictional force that acts between the surfaces in contact that are at rest.
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Siding friction is the frictional force that acts when two one surface slides past the other or when two surfaces are in a sliding motion.
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Rolling friction is the friction force that comes to play when an object rolls over a surface. This happens when the object is spherical, cylindrical or has a similar curved shape.
EXPLANATION:
- The movement of bicycle tyres is opposed by rolling friction as the tyres roll on the surface.
- When the tyres of a bicycle are fully inflated, the curved surface in contact with the surface reduces.
- This reduces the rolling friction and thus, makes it easier to ride.
Hence, rolling friction is the concept behind fully inflated bicycle tyres.
