View
1
Download
0
Category
Preview:
Citation preview
St. John’s E.M High School(Affiliated to the Central Board of Secondary Education, New Delhi)
Class: IX _____________________________________________________________________________________________
Stay Home Stay Fit
The exercises given in this Worksheet are
supposed to be done in a new notebook…..
DIGITAL CLASSES THROUGH VIDEOS AND RELATED
WORKSHEETS WILL BE CONTINUED UNTIL
FURTHER INFORMATION
St. John’s E.M High School(Affiliated to the Central Board of Secondary Education, New Delhi)
Vijayawada
Worksheet – 5, 2020-21 _____________________________________________________________________________________________
The exercises given in this Worksheet are
supposed to be done in a new notebook…..
DIGITAL CLASSES THROUGH VIDEOS AND RELATED
WORKSHEETS WILL BE CONTINUED UNTIL
FURTHER INFORMATION
St. John’s E.M High School
Date: 04-05-2020
_____________________________________________________________________________________________
The exercises given in this Worksheet are
supposed to be done in a new notebook…..
DIGITAL CLASSES THROUGH VIDEOS AND RELATED
WORKSHEETS WILL BE CONTINUED UNTIL
Now you know regular exercise has lots of health benefits for
children and young people. Copy the given poses and hold for 20
seconds. Relax.
Fill in the blanks using appropriate subordinating conjunctions.
1. I make it a point to visit the Taj Mahal _____________ I go to Agra.
2. This is the place _____________ I used to stay when I was studying at college.
3. _____________ you get the first rank, I will buy you a car.
4. _____________ you work hard, you can’t pass the entrance test.
5. I am leaving tomorrow _____________ or not you give me the permission.
6. He could not get a seat, _____________ he came early.
7. The players delivered a splendid performance _____________ they had rehearsed well.
8. Parents should give enough attention to children _________ they will not feel neglected.
9. He is dishonest _____________ no one trusts him.
10. I will note it down _____________ I should forget.
11. _____________ the basement flooded, we spent all day cleaning up.
12.I don’t want to go to the movies _____________ I hate the smell of popcorn.
13.I paid Larry, _____________ garden design work is top-notch.
14. _____________ spring arrives, we have to be prepared for more snow.
15. _____________ the alarm goes off, I hit the snooze button.
………………………………………………………………………………………………
THOROUGHLY READ THE ABOVE CONCEPT, UNDERSTAND IT AND ANSWER THE
BELOW PRACTICE QUESTIONS:
Chapter-2 POLYNOMIALS
n
Division of Polynomials
Another example : (16z3 + 7 – 4z
2 ) (2z – 1 )
Before we can start the division process we need to rearrange the terms in the dividend, so
that they are in descending order of powers. Also note that we have z3 and z
2 terms, but no
z them. We will place z term in our diviend with a coefficient of ‘0’ to use as a
placeholder.
HOME TASK
DiVide the polynomial p(X) by g(X)
1(I)p(X)=x³-5x²+4x-3,g(X)=X+1
(ii)p(X)=x³-3x²+4x+50,g(X)=x-3
(iii)p(X)=4x³-12x²+14x-3,g(X)=2x-1
(IV)p(X)=x³-5x²+4x-3,g(X)=x-2
(V)p(X)=2x³-11x²-4x+5,g(X)=2x+1
………………………………………………………………………………………………..
THOROUGHLY READ THE ABOVE CONCEPT, UNDERSTAND IT AND ANSWER THE
BELOW PRACTICE QUESTIONS:
PHYSICS : Le – 8 Motion
Synopsis 3:
Important Topics:
9. Acceleration
i) Uniform Acceleration
ii) Non Uniform Acceleration
10. Retardation
9. Acceleration: Rate of change of velocity of a body is called
Acceleration = change in velocity / time
CGS Unit: cm/s²
SI Unit: m/s²
It is represented by letter ‘a’
Examples:
i) Uniform Acceleration:
of time.
ii) Non Uniform Acceleration:
intervals of time.
i) Uniform Acceleration
ii) Non Uniform Acceleration
Rate of change of velocity of a body is called
Acceleration = change in velocity / time
It is represented by letter ‘a’
Uniform Acceleration:Equal increase in velocity takes place in equal intervals
Non Uniform Acceleration: Unequal increase in velocity takes place in equal
Rate of change of velocity of a body is called acceleration.
Equal increase in velocity takes place in equal intervals
Unequal increase in velocity takes place in equal
9. Retardation
Deceleration
Negative Acceleration: Decrease in velocity per unit time.
Units same as units of acceleration.
It is represented by the letter
Examples:
Please note that, a body may be travelling with 10,000kmph, if there is no increase
in velocity its acceleration will be zero.
At the same time a body may be travelling with less speed (1kmph) and if there is
an increase in velocity, then it is said to be travelling with acceleration.
: Decrease in velocity per unit time.
Units same as units of acceleration.
It is represented by the letter ‘-a’.
body may be travelling with 10,000kmph, if there is no increase
in velocity its acceleration will be zero.
At the same time a body may be travelling with less speed (1kmph) and if there is
increase in velocity, then it is said to be travelling with acceleration.
body may be travelling with 10,000kmph, if there is no increase
At the same time a body may be travelling with less speed (1kmph) and if there is
increase in velocity, then it is said to be travelling with acceleration.
Worksheet
1. If the displacement of an object is proportional to square of time, then the object
moves with:
(a)Uniform velocity (b) Uniform acceleration
(c)Increasing acceleration (d) Decreasing acceleration
2. Suppose a boy is enjoying a ride on a marry-go-round which is moving with a
constant speed of 10 m/s. It implies that the boy is:
(a) At rest(b) Moving with no acceleration
(c) In accelerated motion(d) Moving with uniform velocity
3. Assertion (A): A body can have acceleration even its velocity is Zero at a given
instant.
Reason(R): A body is momentarily at rest when it reverses its direction of motion.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false. d) A is false but R is true.
4. In a free fall the velocity of a stone is increasing equally in equal intervals of time
under the effect of gravitational force of the earth. Then what can you say about the
motion of this stone? Whether the stone is having:
(a) Uniform acceleration (b) Non-uniform acceleration
(c) Retardation (d) Constant speed
5. The velocity decreases at a constant rate as time increases, what does the object
have?
(a) Constant deceleration (b) Constant acceleration
(c) Constant velocity (d) Constant displacement
6. What is the kind of acceleration due to frictional force?
(a) Positive Acceleration (b) Negative acceleration
(c) Both (d) none of the above
7. Write the SI units of the following:
(a) Acceleration (b) Velocity
8. When will you say a body is in (i) Uniform acceleration, (ii) non-uniform acceleration?
Give examples
9. (a)What do you understand by instantaneous velocity?
(b) What is negative acceleration?
THOROUGHLY READ THE ABOVE CONCEPT, UNDERSTAND IT AND ANSWER THE
BELOW PRACTICE QUESTIONS:
……………………………………..……………………………………………………….
English Key :
1. before 2. as 3. that 4. if 5. that
6. that 7. as / since 8. because 9. than 10. though
11. as 12. before 13. since 14. if 15. before
Maths Key :
Science Key :
Worksheet – 2[key]
1. C
2.
3. A has uniform motion and B has non-uniform motion. Since A covers equal distances in equal
intervals of time whereas B covers unequal distances in equal intervals of time.
4. No, not always. The reason is, though the average speed of a moving body can never be Zero, but
the average velocity of a moving body can be Zero.
SPEED VELOCITY
Speed of a body is the distance travelled
by it per unit time.
Velocity of a body is the distance travelled
by it per unit time in a given direction.
Speed has only magnitude, so speed is a
scalar quantity.
Velocity has both, magnitude as well as
direction, so velocity is a vector quantity.
5. Average speed
6. d
7.
8. (a) T
(b) F
(c) T
(d) F
Social Key :
CHOOSE THE CORRECT ANSWERS
1. A[2015]
2. C[RUSSIAN MINORITY]
3. B[1980]
4. FILL IN THE BLANKS
1.ZANU PF PARTY
2.ROBERT MUGABE
3.INDIGENOUS FIJI
Uniform Velocity Non-uniform velocity
An object with uniform velocity covers
equal distances in equal intervals of time
in a specified direction
An object with Non-uniform velocity covers
unequal distances in equal intervals of time in a
specified direction, or if the direction of motion
changes, it is said to be moving with a non-
uniform.
e.g., an object moving with speed of 40
km/h towards west has uniform velocity.
e.g., revolving fan at a constant speed has
variable velocity.
The following are the links of NCERT text books .
Click on them to view the lessons
CLASS IX MATHS :
Polynomials : http://ncert.nic.in/textbook/textbook.htm?iemh1=2-15
CLASS IX SCIENCE :
Ch 8 : Motion : http://ncert.nic.in/textbook/textbook.htm?iesc1=8-15
Recommended