St. John’s E.M High School1.ZANU PF PARTY 2.ROBERT MUGABE 3.INDIGENOUS FIJI Uniform Velocity Non-uniform velocity An object with uniform velocity covers equal distances in equal

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 _____________________________________________________________________________________________





FURTHER INFORMATION

St. John’s E.M High School

Date: 04-05-2020

_____________________________________________________________________________________________





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

………………………………………………………………………………………………..



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.


increase in velocity, then it is said to be travelling with acceleration.

body may be travelling with 10,000kmph, if there is no increase


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?



……………………………………..……………………………………………………….

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

Documents

St. John’s E.M High School1.ZANU PF PARTY 2.ROBERT MUGABE 3.INDIGENOUS FIJI Uniform Velocity Non-uniform velocity An object with uniform velocity covers equal distances in equal