Question

The frictional force on an object in a fluid depends on its speed with respect to the fiuid. The frictional force also depend on the shape of the object and the nature of the fluid. Birds and fishes have to move about in fluids all the time. Their bodies must have evolved to shapes which would make them use less energy in overcoming friction. 3M

(1)Fluid means


a) common name of gases and liquids

b) common name of solids and gases

c) common name of liquids and solids The frictional force exerted by Fluids is called _________

(2)The frictional force of an object in a fluid depends on


a)shape of the object
b)nature of the fluid
c)it's speed with respect to the fluid
d)all the above​

Answer 1

Answer:

1. a substance that has no fixed shape and yields easily to external pressure; a gas or (especially) a liquid.

A.  FLUID

Fluid is a general term, that both liquid and gas fit under. A liquid has a definite volume and is incompressible. All liquids are fluids, but not all fluids are liquids.

Therefore, fluids are a subset of the phases of matter and include liquids, gases, plasmas and, to some extent, plastic solids, etc.

Hence, the statement is true.

B. none

C. The frictional force on an object in a fluid depends on its speed with respect to the fluid. The frictional force also depends on the shape of the object and the nature of the fluid.

PART 2 OF CIS DRAG FORCE

(2) all the above