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Question

If we drop a cup of water on a plate and a cup of oil on another plate, water is seen to spread faster along diameter. This is an example related to:

A

fluid friction

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B

rolling friction

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C

sliding friction

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D

static friction

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Solution

The correct option is A fluid friction
This example relates to fluid friction. Speed of spreading of a volume of liquid depends on the liquid friction.Friction offered by water is less as its density is less than oil.Fluid friction depends on density of liquid.
So oil being more dense have more friction and it moves very slowly due to more friction.

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