urdu post:
Ek aam insaan apni roz marra ki zindagi mein jo kaam karta hai, unmein bohot si chhupi hui science hoti hai jo aksar hamain mehsoos bhi nahi hoti. Agar hum sirf chalne ka amal dekhein, toh physics ka aik bohot bara kirdar hai. Jab hum chaltay hain, toh friction hamari madad karta hai. Agar zameen bilkul chikni ho, toh hamaray pair phisal jain ge, kyunki friction kaafi kam ho jaye ga. Isi tarah, jab hum kisi cheez ko uthatay hain, toh Newton ka third law kaam kar raha hota hai – jab hum kisi object par force lagatay hain, toh wo bhi hum par utni hi force lagata hai. Ager aik bhaari cheez uthani ho, toh is law ki waja se humein zyada quwwat lagani parti hai.
Jab hum kisi cheez ko zor se uchhalte hain, toh yeh energy conversion ka aik behtareen misaal hoti hai. Jab hum apne haath se ek ball uchhalte hain, toh pehle hamari muscular energy, kinetic energy mein tabdeel hoti hai. Jab ball upar jati hai, toh uski kinetic energy potential energy mein badal jati hai. Aur jab ball neeche girti hai, toh yeh potential energy dobara kinetic energy ban jati hai. Yeh wahi physics hai jo rockets aur space missions mein bhi istemal hoti hai, lekin hum roz marra zindagi mein isay mehsoos nahi karte.
Jab hum aik chaye ka cup uthatay hain, toh wahan bhi physics ka amal hota hai. Cup uthate waqt hamari ungliyan friction ka sahara leti hain, warna cup haath se phisal sakta hai. Jab hum cup ko lips tak le jate hain, toh yahan bhi motion aur balance ka aik science kaam karta hai. Agar cup ko tez harkat dein, toh chai gir sakti hai, kyunki inertia usay roknay ki koshish kare ga. Yeh inertia har jagah hota hai, chahe hum aik gari mein hon ya phir kisi jhoolay par.
Ghar mein kapray dhotay waqt bhi aik chhupi hui science hoti hai. Jab pani aur sabun miltay hain, toh surface tension break hoti hai, jo gandagi ko kapray se alag karne mein madad deti hai. Isi physics ko shampoos aur detergents design karne mein bhi use kiya jata hai. Jab hum kisi kapray ko nichorttay hain, toh centrifugal force ka kaam hota hai, jo pani ko kapray se nikalne mein madad deta hai. Yeh wahi force hai jo washing machines mein pani ko bahar nikalne ke liye istemal hoti hai.
Agar hum garam aur thandi hawa ke asar ko dekhein, toh yeh bhi aik scientific phenomenon hai. Jab hum garam chai peetay hain, toh uski bhap hawa mein mix ho jati hai kyunki heat energy molecules ko tez harkat denay par majboor karti hai. Isi wajah se garam cheezain jaldi hawa mein mix hoti hain aur thandi cheezain dheere dheere evaporate hoti hain. Aik aur misaal yeh hai ke jab hum darwaza tez se band karte hain, toh hawa ka pressure itna barhta hai ke kabhi kabhi pichla darwaza ya khidki bhi hil jati hai. Yeh Bernoulli’s principle ki aik misaal hai jo airplanes ke udnay mein bhi kaam aata hai.
Roz marra ki zindagi mein hum physics ko bina samjhay istemal karte hain, lekin jab isay gahrai se samjha jaye, toh yeh aik ajeeb aur dilchasp cheez lagti hai. Science sirf kitaabon mein nahi, balki har jagah hamaray ird gird chhupi hoti hai, bus dekhne ki nazar honi chahiye.
Jab hum kisi cheez ko push ya pull karte hain, toh force ka concept kaam karta hai. Agar hum aik darwaza dhakka de kar kholte hain, toh yahaan par torque bhi involve hota hai. Torque ka ta’aluq force aur uske lagne ke maqam se hota hai. Agar hum darwaza bilkul qareeb se dhakka den, toh zyada taqat lagani parti hai, lekin agar handle se dhakka dein, toh asani se khul jata hai. Yeh physics ka aik behtareen natija hai jo har roz hum dekhte hain lekin aksar is par gaur nahi karte. Isi concept ko wrench ya spanner ke zariye nut bolt kholne mein bhi istemal kiya jata hai.
Jab hum aik bulb jalaate hain, toh wahan bhi physics ka ek ajeeb phenomenon kaam kar raha hota hai. Bijli ka current jab wire se guzarta hai, toh resistance ki wajah se wo heat aur light generate karta hai. Yeh wahi principle hai jo electric heater aur iron ke andar kaam karta hai. Isi tarah, jab hum kisi switch ko off karte hain, toh aik circuit break hota hai jo current ka flow rok deta hai. Yeh aik chhoti si cheez lagti hai lekin isi wajah se poori dunia mein electrical appliances control ki jati hain.
Agar hum gari mein safar karte hain, toh yahan bhi physics ka aik pura system chhupa hota hai. Jab hum brake lagate hain, toh friction ka law kaam karta hai jo gari ko rukne mein madad deta hai. Isi wajah se brakes har kisi gaari ya cycle ka sabse ahem hissa hoti hain. Aur jab gari chal rahi hoti hai, toh Newton ka first law kaam kar raha hota hai – inertia ki wajah se gari chalti rehti hai jab tak koi external force usay rokay nahi. Yeh wohi principle hai jo astronauts ko space mein motion control karne mein madad deta hai.
Jab hum kisi sheesha ya paani ke andar dekhtay hain, toh light refraction ka concept samajh aata hai. Pani ke andar padhi koi cheez humein todhi hui ya mukhtalif nazar aati hai kyunki roshni ka angle pani mein enter karte hi badal jata hai. Isi tarah, jab hum kisi chamakdar sheesha ya sadak par garmi ke dinon mein haze ya mirage dekhte hain, toh yeh bhi light refraction ka ek nateeja hota hai. Is principle ko optical fibers mein bhi use kiya jata hai jo internet aur communication systems ka aik zaroori hissa hain.
Agar hum awaaz ke bare mein sochein, toh yeh bhi aik ajib aur dilchasp physics ka hissa hai. Jab hum baat karte hain, toh hamari awaaz hawa ke molecules mein vibrations paida karti hai jo agay barhti hai aur dusray shakhs tak pohchti hai. Isi tarah, jab hum kisi masroof road par ya aik khaali kamray mein awaaz sunte hain, toh echo ya reverb create hoti hai. Yeh sound waves ka aik behtareen nateeja hai jo microphones, speakers, aur auditorium designs mein use hota hai.
Jab hum kisi plastic ki cheez ko zyada ragar karte hain aur phir kisi chhoti paper ki tukri ko uske qareeb le kar aate hain, toh yeh tukri us plastic se chipak jati hai. Yeh electrostatic charge ki misaal hai jo triboelectric effect ke zariye hoti hai. Isi wajah se kabhi kabhi sweater utarne ke baad halki si bijli ka jhatka mehsoos hota hai. Isi concept ko laser printers aur xerox machines mein bhi istemal kiya jata hai jo aik aam insaan ki zindagi ka hissa hain lekin unhein iska ilm nahi hota.
Jab hum seerhi chadtay hain ya neeche utartay hain, toh yeh bhi aik physics ka hissa hai. Jab hum upar chadtay hain, toh hum gravity ke khilaf kaam kar rahe hote hain, is wajah se zyada taqat lagti hai. Jab hum neeche utartay hain, toh gravity hamari madad karti hai, lekin agar hum zyada tez utarnay ki koshish karein, toh girne ka khatra barh jata hai. Yeh wahi gravitational force hai jo har cheez ko zameen ki taraf kheench rahi hai, chahe wo ek patta ho jo darakht se gir raha ho ya aik aadmi jo seedhiyan utar raha ho. Isi concept ki buniyad par astronauts space mein weightlessness mehsoos karte hain.
Agar hum hawa ka asar dekhein, toh science wahan bhi apna kaam kar rahi hoti hai. Jab hum kisi tez hawadar jagah par khare hotay hain, toh humein ek taraf jhukne ka ehsas hota hai, kyunki hawa ka pressure hamare jism par force apply kar raha hota hai. Yeh wohi principle hai jo airplanes ke udne ke liye istemal hota hai. Jab aik hawai jahaaz apni wings ke upar aur neeche hawa ka mukhtalif pressure paida karta hai, toh yeh lift force generate karta hai jo plane ko hawa mein uthne mein madad deta hai. Yeh Bernoulli’s principle ka ek behtareen nateeja hai jo hamari roz marra zindagi mein bhi chhupa hai.
Jab hum koi chhoti si cheez, jaise sui ya coin, paani ki satah par daaltein hain, toh aksar yeh dhans jati hai, magar kuch halaton mein tairti bhi hai. Yeh surface tension ka nateeja hota hai jo pani ke molecules ko ek doosray ke sath mazbooti se jor kar rakhta hai. Isi wajah se machhar aur chhoti chhoti makhiyan paani ke upar chal sakti hain bina doobay. Yeh concept detergents aur sabun banane mein bhi istemal hota hai, jo paani ki tension ko break karke zyada asar dar safai karta hai.
Agar hum kisi chhoti patang ko udaayen, toh yeh bhi aik physics ka process hai. Jab hawa patang se takrati hai, toh yeh aerodynamic lift generate karti hai jo patang ko upar uthati hai. Agar patang ka angle theek na ho ya hawa tez na ho, toh patang nahi udti. Yeh wohi concept hai jo racing cars aur ships ke design mein istemal hota hai, jahan hawa aur pani ka flow control karke speed aur stability barhayi jati hai.
Jab hum kisi cheez ko girne se rokne ke liye support dete hain, toh wahan center of gravity ka concept kaam kar raha hota hai. Agar aik chair teen pairo par ho aur aik taraf zyada wazan ho, toh wo gir sakti hai, lekin agar uska wazan barabar ho, toh wo stable rahe gi. Isi wajah se buildings aur bridges ka design iss tarah kiya jata hai ke unka center of gravity stable ho, warna wo gir sakti hain.
Jab hum garam pani mein aik chamach thanda shehad daalte hain, toh wo dheere dheere pani mein mix hota hai. Yeh diffusion ka process hota hai jo temperature aur molecular movement par depend karta hai. Garam pani mein molecules tez harkat karte hain, is wajah se shehad jaldi ghul jata hai. Isi diffusion ka istemal perfumes aur air fresheners mein bhi hota hai jo hawa mein mil kar mehkaatay hain. Yeh sab woh physics ke chhupay hue asool hain jo har roz hamari zindagi mein silently kaam kar rahe hain, sirf unhein samajhne ki dair hai.
english post:
There is a lot of hidden science involved in the work that a common man does in his daily life, which we often do not even feel. If we just observe the act of walking, then physics plays a very important role. When we walk, friction helps us. If the ground is very smooth, then our feet will slip because the friction will be very less. Similarly, when we lift anything, Newton's third law is at work – when we apply force on any object, it also applies the same force on us. If a heavy object is lifted, due to this law we have to exert more force.
When we shake something forcefully, it is an excellent example of energy conversion. When we shake a ball with our hands, first our muscular energy is converted into kinetic energy. When the ball goes up, its kinetic energy is converted into potential energy. And when the ball falls down, this potential energy again becomes kinetic energy. This is the same physics that is used in rockets and space missions, but we do not feel it every day in our lives.
When we lift a tea cup, physics works there too. While lifting the cup our fingers take support of friction, otherwise the cup can slip from the hand. When we take the cup to our lips, here too a science of motion and balance works. If we move the cup fast, the tea can fall, because inertia will try to stop it. This inertia is everywhere, whether we are in a car or on a swing.
Even while lifting the cup at home a hidden science happens. When water and soap mix, the surface tension breaks, which helps in separating the dirt from the cloth. The same physics is also used for designing shampoos and detergents. When we remove any cloth, the centrifugal force comes into action, which helps in removing water from the cloth. This is the same force which is used to remove water in washing machines.
If we observe the effect of hot and cold wind, this is also a scientific phenomenon. When we drink hot tea, its quantity gets mixed in the air because heat energy forces the molecules to move fast. This is why hot things get mixed in the air quickly and cold things evaporate slowly. Another example is when we close the door quickly, the air pressure increases so much that sometimes even the back door or the window shakes. This is an example of Bernoulli’s principle which is also useful in the flight of airplanes.
We use physics in our daily lives without understanding it, but when we understand it deeply, it seems like a strange and interesting thing. Science is not only in books, but our secrets are hidden everywhere, we just need to be careful to see them.
When we push or pull something, the concept of force works. If we open a door by pushing it, torque is also involved here. Torque is related to force and the place of its application. If we push the door very closely, more force has to be applied, but if we push with the handle, it opens easily. This is one of the best results of physics which we see every day but often do not pay attention to it. The same concept is also used for opening a nut bolt by means of a wrench or a spanner.
When we light a bulb, a wonderful phenomenon of physics is taking place there also. When electric current passes through a wire, it produces heat and light due to resistance. This is the same principle which works inside electric heater and iron. Similarly, when we turn off a switch, a circuit breaks which stops the flow of current. This may seem like a small thing but due to this reason electrical appliances are controlled all over the world.
If we travel in a car, a complete system of physics is hidden here also. When we apply brakes, the law of friction comes into play which helps in stopping the car. This is why brakes are the most important part of every car or cycle. And when the car is moving, Newton's first law comes into play – due to inertia the car keeps moving as long as no external force stops it. This is the same principle which helps astronauts to control their motion in space.
When we look inside any glass or water, we understand the concept of light refraction. Anything hidden in water appears broken or different to us because the angle of light changes as it enters the water. Similarly, when we see haze or mirage on a shiny mirror or road during summer days, this is also a result of light refraction. This principle is also used in optical fibres which are an important part of internet and communication systems.
If we think about sound, this is also a strange and interesting part of physics. When we talk, our voice produces vibrations in the air molecules that spread forward and reach the other person. Similarly, when we hear a sound on a busy road or in an empty room, an echo or reverb is created. This is one of the best results of sound waves that is used in microphones, speakers, and auditorium designs.
When we heat any plastic object too much and then bring a small piece of paper near it, the piece sticks to the plastic. This is an example of electrostatic charge which occurs through the triboelectric effect. This is why sometimes a slight electric shock is felt after taking off the sweater. The same concept is also used in laser printers and xerox machines which are a part of the life of a common man but they do not have the knowledge of this.
When we climb up or descend, this too is a part of physics. When we climb up, we are working against gravity, that is why more force is required. When we descend down, gravity helps us, but if we try to descend too fast, there is a risk of falling. This is the same gravitational force which is pulling everything towards the ground, be it a leaf falling from a tree or a person descending from a tree. Based on this concept, astronauts feel weightlessness in space.
If we see the effect of wind, science is doing its work there too. When we stand on a strong windy place, we feel a bending on one side because the pressure of air is applying force on our body. This is the same principle which is used for flying of airplanes. When an airplane creates different pressure of air above and below its wings, it generates lift force which helps the plane to rise in the air. This is one of the best results of Bernoulli’s principle which is also hidden in our daily life.
When we put a small thing, like a needle or a coin, on the surface of water, it often sinks but it also floats in some conditions. This is the result of surface tension which keeps the water molecules strongly pressed against each other. This is the reason why flies and small flies can move on water without sinking. This concept is also used in making detergents and soaps, which clean more efficiently by breaking the tension of water.
If we fly a small kite, this too is a physical process. When the wind hits the kite, it generates aerodynamic lift which makes the kite fly up. If the angle of the kite is not right or the wind is not strong, the kite will not fly. This is the same concept that is used in the design of racing cars and ships, where speed and stability are increased by controlling the flow of air and water.
When we give support to something to stop it from falling, the concept of center of gravity is at work there. If a chair is on three legs and there is more weight on one side, it can fall, but if its weight is equal, it will remain stable. This is why buildings and bridges are designed in such a way that their center of gravity is stable, otherwise they can fall.
When we put a spoon of cold water in hot water, it slowly mixes with the water. This is the process of diffusion which depends on temperature and molecular movement. The molecules in hot water move fast, due to this the honey dissolves quickly. This diffusion also happens in perfumes and air fresheners which mix in the air and create a fragrance. All these are those principles hidden behind physics which are working silently in our lives every day, it is just difficult to understand them.
