A drop of water of radius r is falling through the air of coefficient of viscosity - with a constant velocity of v- The resultant force on the drop is-

The correct option is B zeroWhen a drop is falling at constant velocity, #160;viscous force is balanced by weight, hence #160;resultant force is zero. ...

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard VIII

Physics

Viscosity

A drop of wat...

Question

A drop of water of radius r is falling through the air of coefficient of viscosity $η$ with a constant velocity of v. The resultant force on the drop is:

\frac{1}{6 π η r v}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

6 π η r v

No worries! We‘ve got your back. Try BYJU‘S free classes today!

\sqrt{6 π η r v}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

zero

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is B zero
When a drop is falling at constant velocity, viscous force is balanced by weight, hence resultant force is zero.

Suggest Corrections

Similar questions

Q. The viscous force

F

acting on a rain drop of radius '

a

' falling through air of coefficient of viscosity

^{'} η^{'}

with terminal velocity

V

is given by

F

α

n^{x} a^{y} V^{z}

. The values of

x, y

and

z

are :

Q. The critical velocity

v

of a body depends on the coefficient of viscosity

η

, the density

d

and radius of the drop

r

. If

K

is a dimensionless constant then

v

is equal to :

Q. Rain drop of radius

0.2 m m

falling with velocity of

2 m / s

. If coefficient of viscosity of air is

1.8 \times 10^{- 4} N s / m^{2}

, determine viscous force acting on the drop.

Q. Spherical balls of radius

R

are falling in a viscous fluid of viscosity

η

with a velocity

v

. The retarding viscous force acting on the spherical ball is:

Q. A rain drop of radius 0.3 mm falls through air with a terminal velocity of 1 m

s^{- 1}

. The viscosity of air is

18 \times 10^{- 5}

poise. The viscous force on the rain drop is then

Join BYJU'S Learning Program

A drop of water of radius r is falling through the air of coefficient of viscosity η with a constant velocity of v. The resultant force on the drop is:

The correct option is B zeroWhen a drop is falling at constant velocity, viscous force is balanced by weight, hence resultant force is zero.

A drop of water of radius r is falling through the air of coefficient of viscosity $η$ with a constant velocity of v. The resultant force on the drop is:

The correct option is B zero
When a drop is falling at constant velocity, viscous force is balanced by weight, hence resultant force is zero.