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Understanding Hooke's Law: The Foundation of Elasticity| Chapter 5 Physics 9th

HOOKE'S LAW   Introduction In physics, Hooke's Law is one of the fundamental principles governing how objects deform under external forces . Named after the 17th-century British physicist Robert Hooke, this law provides a crucial understanding of the behavior of elastic materials, such as springs and rubber bands. Whether stretching a rubber band or compressing a spring, Hooke's Law helps explain what happens when forces act on these materials. What is Hooke's Law: Hooke's Law states that the force F needed to extend or compress a spring by some distance x is proportional to that distance. Mathematically, it is expressed as: F= -kx Here k represents the spring constant, which is the measure of the stiffness of the spring, and x is the displacement from the displacement position.  The negative sign indicates that the force exerted by the spring is in the opposite direction of the displacement.  Understanding the Spring Constant: The spring constant k is a critical co

Chapter 13: Shopping | Complete solved Exercises | 10th English Sindh Board

SHOPPING

Ø SUMMARY OF “SHOPPING”:

Mother wanted to do shopping, so he took Najma and Ajmal with her as their father was on tour and as they ran out of the grocery and provisions. Ajmal and Najma were very excited to do the home shopping for first time. They hired a taxi from road side the taxi was charging 25Rs for market, as meter out of order. Mother offered him 15 rupees as the market was hardly 2km far. The taxi driver agreed and they arrived the market.

Ajmal and Najma saw slaughtered animals hanged on the butcher’s shop. They asked the difference between mutton and beef, and mother replied, “Beef is the meat of cows while Mutton is the meat of goats and sheep”. From butcher’s shop they purchased 1 kg of leg meat and 1kg of minced meat.

Then they went to the vegetable market where they purchased 5 kilo of onions, 2kg of potatoes, 1 kg each of cabbage, cauliflower and turnips, and green peas, two kilo of spinach, and five kilos of carrots. They bought ten bananas and one kilo of apples.

From grocery shop, they purchased one kilo of salt, a quarter of red chilies, a quarter of black peepers, and other spices, three cartons of soaps and two bars of washing soaps, four cakes of toilet soaps, a kilo bag of porridge and a jar of honey and a bottle of both tomatoes sauce and vinegar and two packets of biscuits.

The shopkeeper wrapped all the items in a large paper bag. Mother told the children today instead of polytene bags paper bags are used all over the world as polythene bags blocks the sewerages pipes and due to these drains are also chocked and dirty water also spills all over. Mother asked about the price of eggs and bought 2 dozen of eggs and 1 kilo of dressed chicken.

When they returned to the home mother instructed them to get ready for their school and told Ajmal to polish is own as well as Najma’s shoes and she told Najma to iron her and Ajmal’s clothes and she herself started cooking in the kitchen.

 

IMPORTANT QUESTIONS AND ANSWERS

Q1:Why did mother took Ajmal and Najma  for shopping?

Ans. Mother wanted to do shopping, so he took Najma and Ajmal with her as their father was on the vacations and they were out of the groceries and provisions. Najma and Ajmal were very excited that they are going for shopping for the first time.

Q2: How much fare did taxi driver demanded? What did mother argue with the taxi driver for taking more fare?

Ans. The taxi driver was charging 25 rupees for the market as meter was out of the order, but mother argued and asked to give 15 rupees for the market as it was hardly 2km away and taxi driver agreed with the argue of mother and they arrived to the market.

Q3: What did mother buy from the butcher’s shop?

Ans. Mother bought 1 kilo of leg meat and 1 kilo of minced meat.

Q4: What is the difference between Beef and mutton?

Ans. Beef is the meat of cows while mutton is the meat of goats and sheep.

Q5: Where did mother go after butcher’s shop and what did she buy?

Ans. After butcher’s shop mother went to the vegetables market and bought five kilo of onions, two kilo of potatoes, one kilo each of cabbage, cauliflower and turnips and green peas. Two kilo of spinach and five kilo of carrots.

Q6: What did she buy from the fruit market?

Ans. She also bought ten bananas and one kilo of apples.

Q7: What did she buy from green grocer’s shop?

Ans. From grocery shop, they purchased one kilo of salt, a quarter of red chilies, a quarter of black peepers, and other spices, three cartons of soaps and two bars of washing soaps, four cakes of toilet soaps, a kilo bag of porridge and a jar of honey and a bottle of both tomatoes sauce and vinegar and two packets of biscuits.

Q8: When do we use meter, kilometer, liter, and kilogram?

Ans. Meter is used to measure the length of clothes. Kilometer is used to measure large distances. Liter is the unit of volume while measuring the liquid thing we use liter as its unit.

Q9: Why are polythene bags replaced by the paper bags?

Ans. Now a days instead of polythene bags paper bags are used because polythene bags block the sewerages and pipes and due to this the drains are also chocked and water spoils all over.

Q10: What did mother buy last of all? OR What children buy from poultry shop?

Ans. Mother asked the price of eggs and bought two dozens of eggs and one kilo of dressed chicken.

Q11: What did mother asked the children to do when they arrived home?

Ans. When they arrived home mother told Ajmal to polish his and Najma’s shoes and she also told Najma to iron Ajmal’s and her clothes.

SOLUTION OF THE BOOK’S EXERCISES

Exercise-B: Learn the meaning of the words from the lesson and use ten of them in your own sentences.

WORDS

SENTENCES

Gulped

He gulped the food because he was in hurry.

Beef

This is beef market.

Butcher

Mother went to butcher’s shop for buying meat.

Cabbage

I do not like to eat Cabbages.

Calves

Many calves were grazing in the fields.

Carton

They bought a carton of soaps.

Cauliflower

Cauliflower is a green vegetable.

Chilies

Do not use too many chilies in the food.

Hire

Mother hired taxi for going to market.

Kilogram

He bought 5 kilograms of sugar.

 

Exercise-C: (a)Find the words with similar meaning from the list given below:

LIST A

LIST B

Frightened

Afraid

Hail

Greet

Buy

Purchase

Carton

Box

Provisions

Supplies

Pointing

Hinting

Threaten

Warn

 (b) Find in the list the opposite to the words in list A.

LIST A

LIST B

Swim

Drown

Alive

Dead

Float

Sink

Front

Back

Start

Stop

Boil

Freeze

Part

Whole

Buy

Sell

Agree

Disagree

Reject

Accept

D(a): Out of order, out of date, in force, in order, up to date, to date.
               With the help of the phrases given above, complete the following sentences.
1.     The old system of weights and measures is no longer in force.
2.     You must revise your book and bring it up-to-date.
3.     The shopkeeper told him that their weighing machine was out of order.
4.     I have received no letter from him to date.
5.     This rule is in order you must follow it.
6.    
That book  was published ten years ago it is completely out of date.
D(b): Cake, bar, jar, carton, bag, roll, packet.
               Complete the following sentences using the words above:
1.     A Carton of soap cake contains 144 soap-cakes.
2.     Please bring a jar of Swat honey for me.
3.     What is the price of one bag of flour?
4.     The price of a cake of soap has increased by one rupee.
5.     The shopkeeper charged me five hundred rupees for this roll of cloth.
6.    
This packet contain 25 biscuits.
(c) Fill in the blanks with the appropriate prepositions.
1.     The driver brought the taxi to a sudden halt.
2.     He took of his old coat and put on new one.
3.     Please turn on the radio and turn off the TV.
4.     Before leaving the kitchen she put of the fire.
5.     She turned out the cat and shut the door.
6.     My friend turn up the late in cinema.
7.     The watchman turned out to be the thief.
8.    
The plane took off at 10’o clock.
 
(d) Change the following sentences into active voice.
·       He was robbed and beaten by unknown person.
Some unknown persons robbed and beat him.
·       The field was ploughed, the seed was sown and the crop was harvested by the farmer.
The farmer himself ploughed the field sowed the seed and harvested the crop.
(e) Change the following into passive voice.
·       She brushed, ironed and cleaned her coat.
Her coat was brushed, ironed and cleaned by herself.
·       I brought this news to him.
This news was brought by me to him.
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