A particle of mass m attached to an inextensible light string is m

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Class 11 Physics Mechanics Mechanical Properties of Fluids

A particle of mass

m

attached to an inextensible light string is moving in a vertical circle of radius

r

. The critical velocity at the highest point is

v_{o}

to complete the vertical circle. The tension in the string when it becomes horizontal is

(a)

\frac{3 m v _{0}^{2}}{r}

(b)

\frac{3 m v _{0}^{2}}{r}

(c)

3 m g

(d)

both (a) and (c) are correct

Correct answer: (c)

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mechanical properties of fluids

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mechanical properties of fluids

laws of motion

energy and power

work

gravitation

View All ↓

Assertion :A large soap bubble expands while a small bubble shrinks, when they are connected to each other by a capillary tube.
Reason :The excess pressure inside bubble (or drop) is inversely proportional to the radius.

A cone of radius

R

and height

H

is hanging inside a liquid of density by means of a string as shown in the figure.

A drop of oil is placed on the surface of water. Which of the following statement is correct?

Whan a midrib of a coconut leaf, pencil etc. are dipped in water, and taken out, water is seen sticking to them. Why?

Choose the correct answer from the given options below:

The phenomenon due to which the exposed liquid behaves like a stretched membrane is called :

Area of liquid film is

6 \times 10 c m^{2}

and surface tension is

T = 20 d y n e / c m

, what is the work done to change area up to

12 \times 10 c m^{2}

Surface tension is due to

A spherical drop of water has

1 m m

radius. If the surface tension of the water is

50

10^{- 3}

N / m

, then the difference of pressure between inside and outside the spherical drop is :