APEEJAY SCHOOL, SHEIKH SARAI-I HOLIDAY HOMEWORK – 2015

CLASS – IX

ENGLISH

1. Design a word grid or web chart on words/ vocabulary related to events like elections, marriage, professions,

antonyms, synonyms, foreign words commonly used in English language.

Make an attractive chart based on any one topic of your choice. Remember to make it colourful and bright

using your creativity and incorporating illustrations wherever possible!

2. Read and relish the story about the hypochondriac friends who set out on an amusing journey in

'The Three Men in a Boat' by Jerome K Jerome. Read the first fourteen chapters which you will really enjoy!

3. Complete exercises given in the Integrated Grammar Practice in your Workbook as far as possible as it will give

you good practice in different areas of English grammar!

Cheer Up! Enjoy and relax too!

PHYSICS

1. Define the term displacement. Is it a vector quantity or a scalar quantity?

2. Define the term distance. Is it a vector quantity or a scalar quantity?

3. The displacement of a body can never be greater than the distance covered by a body. Is the statement

true or false?

4. Can a body have zero velocity and still acceleration? Give example.

5. What is the nature of distance time graph for uniform motion of an object?

6. What is the acceleration of a freely falling body?

7. What is the acceleration of a body moving with uniform velocity?

8. What does the slope of a distance-time graph give?

9. What does the area of a velocity-time graph give?

10. Give two examples of vector quantities.

11. An object is moving up an inclined plane. Its velocity changes from 15m/s to 10m/s in two seconds.

What is its acceleration? (ans. -2.5m/s2)

12. A body covered a distance of x meters along a semicircular path. Calculate the magnitude of

displacement of the body, and the ratio of distance to displacement?

13. A particle moving with an initial velocity of 5m/s is subjected to a uniform acceleration of -2.5m/s2.

Find the displacement in the next 4 sec. (ans. 0)

14. A car covers 30km at a uniform speed of 30km/hr. what should be its speed for the next 90km if the

average speed for the entire journey is 60km/h? (ans. 90km/hr)

15. A person goes to market, makes purchases and comes back at a constant slower speed. Draw

displacement -time and velocity time graphs of the person?

16. A boy runs for 10 min. at a uniform speed of 9km/h. At what speed should he run for the next 20 min. so

that the average speed comes 12km/hr? (ans.13.5km/h)

17. A particle was at rest from 9 a.m. It moved at a uniform speed 10km/hr from 9.30 a.m. to10 a.m. Find

the average speed between (a) 9.00 a.m. and 10.00 a.m., (b) 9.15 a.m. and 10.00 a.m. (ans. 5km/h,

6.67km/h)

18. An insect moves along a circular path of radius 10 cm with constant speed. If it takes 1 min. to move

from a point on the path to the diametrically opposite point, find (a) the distance covered, (b) the speed, (c)

the displacement, (d) average velocity.

19. A particle with a velocity of 2m/s at t=0 moves along a straight line with a constant acceleration of

0.2m/s2. Find the displacement of the particle in 10s?

20. A particle is pushed along a horizontal surface in such a way that it starts with a velocity of 12m/s. Its

velocity decreases at a uniform rate of 0.5m/s2. (a) Find the time it will take to come to rest. (b) Find the

distance covered by it before coming to rest.

21. A train accelerated from 20km/hr to 80km/hr in 4 minutes. How much distance does it cover in this

period? Assume that the tracks are straight?

22. A cyclist moving on a circular track of radius 50m completes one revolution in 4 minutes. What is his

(a) average speed (b) average velocity in one full revolution?

23. Define Scalar quantities and Vector quantities.

24. Define the term “uniform acceleration”. Give one example of a uniformly accelerated motion.

25. Define the term acceleration. Is it a vector quantity or a scalar quantity?

26. Cars moving along a straight line at a speed of 54km/hr stop in 5s after the brakes are applied. (a) Find

the acceleration, assuming it to be constant. (b) Plot the graph of speed versus time. (c) Using the graph.

Find the distance covered by the car after the brakes are applied.

27. A car moves 100m due east and then 25m due west. (a) What is the distance covered by the car? (b)

What is its displacement?

28. An athlete runs from one end to the other end of a semi circular track whose radius is 70m. What is the

distance covered by the athlete and what is his displacement? [ Ans: Distance= 220m, Displacement= 140m]

29. A body starts from rest and moves with a uniform acceleration of 5m/s2 for 5s and then it moves with a

constant velocity for 4s. Later it slows down and comes to rest in 5s. Draw the velocity graph for the motion

of the body and answer the following questions:

a. What is the maximum velocity attended by the body?

b. What is the distance travelled during this period of acceleration?

c. What is distance travelled when the body was moving with constant velocity?

d. What is the retardation of the body while slowing down?

e. What is the distance travelled by retarding?

f. What is the total distance travelled?

Ans: (a) 25m/s, (b) 6.25m, (c) 100m, (d) 5m/s2 , (e) 62.5m,(f) 225m

30. An athlete moves 150m in 2minutes and next 50m in 20s on the same straight path. What is his average

speed and average velocity?

31. A swimmer swims 90m long pool. He covers the distance of 180m by swimming from one end to other

end and back along the same path. If he covers the first 90m at speed of 2m/s, then how fast he swim so that

his average speed is 3m/s?

32. A vehicle moves at a speed of 40 km/h. It is stopped by applying brakes which produces a uniform

acceleration of -0.6m/s2 . How much distance will the vehicle move before coming to stop?

33. Brakes applied to a car produces an acceleration of 5m/s2 in the opposite direction to the motion. If car

takes 1.5s to stop after applying the brakes, calculate the distance travelled by it.

34. A person walks along the sides of a square field Each side is 100m long. What is the maximum

magnitude of displacement of the person in any time interval?

CHEMISTRY

Q1: Assign reasons for the following:

(a) Naphthalene balls disappear if kept in air for a few weeks.

(b) Wet clothes do not dry easily in a rainy day.

(c) Gases are highly compressible while solids are not.

Q2: Arrange in the order indicated for solid, liquid and gas.

(a) Effect of pressure

(b) Empty spaces in the particles

(c) Tendency to flow

(d) Thermal expansion

Q3: Butter is generally wrapped in wet clothes during summers when no refrigerator is available. Explain

Q4: Kelvin scale is considered as a better scale than a Celsius scale. Why?

Q5: Explain with the help of an activity that matter has a particulate nature.

Q6: How is humidity related to evaporation?

Q7: Define temperature .Name the instrument used for measuring it& how its calibration done?

Q8: Explain the working of desert cooler.

Q9: What are the characteristics of the particles of matter?

Q10: Differentiate between boiling &evaporation.(4 points)

BIOLOGY

FRENCH

1. Chaque dimanche écrivez une page avec la date.

(Every Sunday write one page write date in french)

2. Soulignez 20 verbes dans votre livre et conjuguez :

(underline 20 verbs in your book and conjugate them in the following tenses)

a. au présent

b. au passé composé

c. au passé récent

d. à l’imparfait

e. au futur proche

f. au futur

g. au conditionnel

h. à l’impératif

3. Make a project / chart on the topics discussed in class.

SOCIAL SCIENCE

Geography

Choose any one river in India and prepare a project.

Some guidelines are given.

Make maps on the source, course catchment areas, tributaries and states benefitted.

Collect data on the length of the river, the frequency of flooding and dams and reservoirs on them.

Geographic features formed by the river – pictures, drawing etc.

Pollution level of the river, stretches where pollution levels are high and their causes

AND

a) Describe the essential features for safe housing in flood prone areas.

b) Mention other important things to be incorporated while making a plan for disaster mitigation in

flood plains

History and Political Science

1. Compare a democratic with a non-democratic form of government by giving one example from

contemporary world.

OR

Choose either the Armed Forces or Civil Defence Forces in India and study

1. The role that they play in internal and external security of India.

2. Collect information about areas where the Force has been called upon to maintain peace.

3. List the International Human Rights Law and the Universal Declaration of Human Rights.

MATHEMATICS

1. Find ten rational numbers and ten irrational numbers between -3/11 and ½.

2. Find five rational numbers between 0.1230523….and 0.1256792…

3. Find two irrational numbers between 0.5 and 0.55.

4. Express in the form p/q:

a)

32.1 b)

544.2 c)

0190.0 d)

279.3 e)

087.2

5. Visualise the following numbers by successive magnification:

a) 0.37777 b)2.685 c)4.2621 d)3.0214 e) 5.162

6. Represent the following numbers on the number line:

a) √ 9.2 b) √14 c) √5.7 d) √20 e) √24

7. Rationalise the denominator:

a) (3+√5)/√7 b) 1/(4+√5) c) (√3-1)/(√3+1) d)1/(√3-√5) e) (5+√8)/√6

8. Simplify each of the following:

a) (4+√2)(2+√5) c) (7+3√7)(3+√7) e) (3√2-7√3)(√2-√3)

b) (3-2√2)(√6+√2) d) (1+2√2)(5+√6) f) (6+√6)(6-√6)

9. Find ‘a’ and ‘b’ in each of the following:

a) (√3-1)/(√3+1) = a-b√3 b)(3+√2)/(3-√2) = a+b√2

c) (√11-√7)/(√11+√7) = a-b√77 d) (4-3√5)(4-3√5) = a+b√5

10. Evaluate:

a) (64/25)-3/2

b)( 125)-1/3

11. If p(x)=2x2-5x+4, find p(0),p(-1).

12. Find the remainder when p(x)= x4+2x

3-3x

2+x-1 is divided by (x-1).

13. Find the value of ‘a’ for which the polynomial

a) x4-x

3-11x

2-x+a is divisible by (x+3)

b) 2x3-3x

2-18x+a is divisible by (x-4)

14. The polynomials ax3+3x2-3 and 2x3-5x+a when divided by (x-4) leave the same remainder, find the value

of ‘a’.

15. Verify that :

a) 2 is a zero of the polynomial (x+2)(x-2)

b) -1/2 is a zero of the polynomial (2y+1)

PROJECT WORK

1. Prepare a chart to verify the formula (a+b+c)2 .

2. Prepare a working model to find the volume of a cube.

3. Prepare a working model to show that the volume of a cone is 1/3 times the volume of a cylinder.

4. Prepare a project on the story of ‘pi’and also a working model to show that ‘pi’=3.14.

5. Prepare a project/chart on mathematical riddles.

6. Prepare a working model of mathematical formulae.

7. Design a project/working model showing day-to-day applications of Heron’s formula.

8. Design a model of the Cartesian plane.

9. Design a project/working model to show that the surface area of a sphere is 4∏r2

COMPUTER

In Class IX we have already started working in HTML. In HTML, we can design the webpages and websites. So

during these holidays lets have fun and design website using various markup tags and different tools we have

already used. So each student has to make a website comprising of 3-4 pages linked together for the following

topic

Wedding Cake shop

Scenario:

A new designer cake shop knows very little about computers but wants to take their business online. The main

focus of the business is wedding cakes, however they are looking to expand the business to possibly cater for other

types of cakes such as birthdays and other Celebrations.

An easy to update site(wordpress or blog) we would like to keep people up to date with our latest events or plans.

The website should be attractive to make people feel like they want to eat the cakes. Webpages should include the

following :

a) Ingredient and Price listings.

b) Contact order form.

c) Various types of items our cakeshop have

d) Feedback form

We can take the help of following URLs to prepare the project

www.supercake.in

http://www.vanillabakeshop.com/

Submit the project in the form of CD.

HINDI

SANSKRIT