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Physics | 11 | JEE | Mechanical Properties of Fluids | Fluid Dynamics

P10.2 Fluid DynamicsTotal Time:150 Minutes


The youtube playlist link for the chapter is http://bit.ly/P10-MechanicalPropertiesOfFluids In case the Problem Solving Videos are being played from YouTube please adjust the setting to HD to get the best playback quality.

Please go through the PPT in advance to understand the order in which things have to be played.

During the class, please adhere to the time limit prescribed for each component of the lesson


Spot Test

Spot Test not started yet


Spot Test 04:56

QUESTION 1/5 The velocity of a particular particle _________ as it moves from one point to another in a steady flow.

(A) may change

(B) remain constant


Spot Test

QUESTION 2/5 Steady flow is achieved at _______ flow speeds.

(A) very low

(B) high

(C) all

04:56


Spot Test

QUESTION 3/5 Bernoulli’s equation applies to all fluids.

(A) true

(B) false

04:56


Spot Test

QUESTION 4/5 The velocity of fluid flow is _____ at narrow portions of a pipe and _____ at broader portions of the pipe.

(A) high, high

(B) low, low

(C) high, low

(D) low, high

04:56


Spot Test

QUESTION 5/5 Equation of continuity is the statement of conservation of Energy in a fluid flow.

(A) true

(B) false

04:56


Spot Test Result

(A) may change

(A) very low

(B) False

(C) high, low

(B) False

1.

2.

3.

4.

5.

(A) True

(A) True


Spot Test - Class Performance

Graphs are displayed on the projector


P10.2.1 Equation of Continuity

Video is being played on the projector


ConcepTest

ConcepTest not started yet


ConcepTest

In steady flow of a fluid, the acceleration of any fluid particle is

(A) Constant

(C) Variable

(B) Zero

(D) can't say

FIRST VOTE


ConcepTest

Class performance is displayed on projector

First vote response: A


ConcepTest

In steady flow of a fluid, the acceleration of any fluid particle is

(A) Constant

(C) Variable

(B) Zero

(D) can't say

SECOND VOTE



ConcepTest


Second vote response: D

Correct answer: D


ConcepTest Solution

Here in case the diameter of the pipe does not change and the height of the pipe does not change, the velocity remains constant, and there is no acceleration. But if there is a bend or change in diameter, the fluid particles might have to accelerate. When there is a bend, the fluid particles accelerate to change direction. When there is a change in diameter, the speed of the fluid particles change hence they must have accelerated. Hence we need more information and we cannot say for sure about the acceleration.


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