Question

3. Alida runs her toy car on dry marble floor, wet marble floor, newspaper
and towel spread on the floor. The force of friction acting on the car on
different surfaces in increasing order will be
(a)
wet marble floor, dry marble floor, newspaper and towel.
(b) newspaper, towel, dry marble floor, wet marble floor
(c) towel, newspaper, dry marble floor, wet marble floor,
(d) wet marble floor, dry marble floor, towel, newspaper​

Answer 1

Answer:

(a) Wet marble floor, dry marble floor, newspaper and towel.

Explanation:

Force of friction depends on the nature of surface in contact. The rougher the surface, the more is the friction between the surfaces in contact. Roughness present in the given surfaces can be arranged in an ascending order as wet marble floor, dry marble floor, newspaper and towel.

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Answer 2

Answer:

{ a }

$.wet \: marble \: floor \: , dry \: marble \: \\ floor \: , newspaper \: and \: towel.$