Gujarat BoardEnglish MediumSTD 8ScienceFriction2 Marks
Question
Airplanes are designed to have streamlined shape.
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Answer
$-$Force exerted by the fluid $($air$)$ on the object depends on the
$(i)$ speed of object with respect to fluid
$(ii)$ shape of the object and
$(iii)$ nature of the fluid.
$-$When Airplanes are flying they do not have to lose energy while overcoming the frictional force exerted by air.
$-$In order to reduce the friction, airplanes are given special shape called streamlined shape.
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