One or more forces are acting in the following examples. Name them.
(a) An object falling from a tall building ....
(b) An aeroplane flying in sky ....
(c) Squeezing sugarcane juice with a squeezer ........ .
(d) Winnowing foodgrain ....... .

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Solution

(a) An object falling from a tall building: Gravitational force
(b) An aeroplane flying in sky: Mechanical and Gravitational force
(c) Squeezing sugarcane juice with a squeezer: Muscular force
(d) Winnowing foodgrain: Muscular and Gravitational force

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