Question

12. In science class Rajan came to know that
water, air and other liquids apply friction on
the moving objects. Friction due to liquids
depends upon which factor?
(a) Shape of object.
(b) Nature of liquid.
(c) Both (a) and (b).
(d) None of the above.​

Answer 1

Answer:

The speed of the object moving through a fluid affects the amount of friction acting against the motion of the object. More the speed, more is the friction. If the object is broad, it gives more area for the friction to act on. Thus, a streamlined body structure helps to cut through the fluid and reduce friction. Also, the nature of the fluid affects friction.