Question

Frictional force on a moving object in a fluid depends on :
(i) Shape of the object
(ii) Mass of the object
Choose the correct one.

• A. Only (i) is correct
• B. Only (ii) is correct
• C. Both (i) and (ii) are correct
• D. Both (i) and (ii) are incorrect

Answer 1

The correct option is A Only (i) is correct

Frictional force in fluids depends on the shape of the moving object. Objects that moves through fluids are mainly designed to reduce the friction caused by a fluid. The shape of aeroplanes, submarines, bullet trains are designed in streamlined shape, so that they experience less air drag.