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Use app Login Class 11 >>Physics >>Work, Energy and Power >>Energy Conversions >>State and prove law of conservation of e Question State and prove law of conservation of energy in case of freely falling body? Medium Open in App Solution Verified by Toppr Law of conservation of energy states that:− Energy can neither be created nor be destroyed. Energy transforms from one form to another form and, potential energy+ kinetic energy= constant Proof:− At point A K.E=0m/s P.E=mgh P.E=mgh At point B, K.E., 2gh=V2−O2 V2=2gx K.E=21mV2 K.E=21m.2gx K.E=mgx-----------------------------(1) P.E=mgh P.E=m.g.(h−x) P.E=mgh−mgx---------------------(2) from(1) and (2) K.E+P.E constant mgx+mgh−mgx=mgh mgh=mgh At point C, P.E=0 2gh=v2

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Practice paper ka sa likala

Posted by Mayank Sharma 4 years ago

CBSE > Class 09 > Science

2 answers

Reena Bharti 3 years, 11 months ago

Anything that occupies space & has some mass is called matter

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Priya Tamang Golay 4 years ago

What is matter

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ANSWER

Define atomic number and Mass number.

Posted by Júwáíríà Ñààz 4 years ago

CBSE > Class 09 > Science

4 answers

Preksha Kanted 4 years ago

Atomic number is defined the total number of protons present in one atom . Mass number is defined the total number of protons and neutrons present in one atom .

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Júwáíríà Ñààz 4 years ago

Thnks Alka

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Smile 😇 4 years ago

Atomic number is defined the total number of protons present in one atom of an element Mass number is defined the total number of protons and neutrons present in one atom of an element

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07. Shahbaz Ali 9D Jmi 4 years ago

Cannot define paid

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DEVIL FOR DEVIL KIND FOR KIND It's my Attitude People please don't mind

Posted by Âťťíťůđē Bøý 4 years ago

CBSE > Class 09 > Science

5 answers

Farha Shaikh 3 years, 11 months ago

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K_Hushii 🍁 4 years ago

Gajab bro......

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(༎ຶ Isha ༎ຶ) 4 years ago

Supub

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Garima ❤️ 4 years ago

Nice ?

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Mayank Mannat 4 years ago

???????✌..

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CBSE ka paper kha se banta hai.....

Posted by Kashish Khan 4 years ago

CBSE > Class 09 > Science

4 answers

Shine_ Sun._._ 3 years, 11 months ago

Banane wale ko pata hoga..😁

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Rishu Kumar 4 years ago

Book se

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(༎ຶ Isha ༎ຶ) 4 years ago

From book

2Thank You

Zoher Kalynpura 4 years ago

What is atom

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???? ?? ???????

Posted by Srijana Baraily 4 years ago

CBSE > Class 09 > Science

4 answers

K_Hushii 🍁 3 years, 11 months ago

Physics is a very irritating subject........dimag hi hilla deta h ??

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Siddhi Vats 4 years ago

I think yes

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Kashish Khan 4 years ago

No I like it

2Thank You

Âťťíťůđē Bøý 4 years ago

Physics is a subject which irritate everyone

3Thank You

ANSWER

I am going to stop sending quotes here 1 boy complained for it

Posted by Âťťíťůđē Bøý 4 years ago

CBSE > Class 09 > Science

2 answers

(༎ຶ Isha ༎ຶ) 4 years ago

One quote for that who has complained :- " Agar itna attitude hai na to usa apne jab ma rakh hamsa to aapna hi nahi samhala jata........" Hey please? don't stop sending quotes .

4Thank You

Âťťíťůđē Bøý 4 years ago

Thanks but I can't say his name and sorry I will not send any quotes here

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Artificial satellite is moving circular orbit of radius 42250 km. Calculate its speed is it takes 24 hours to revolve around the earth

Posted by Sumit Srivastav 4 years ago

CBSE > Class 09 > Science

0 answers

ANSWER

If mass is double what effect on kinetic energy

Posted by Payal Gurjar 4 years ago

CBSE > Class 09 > Science

2 answers

Dipendra Rathaur 4 years ago

Then K.E become half

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Raushan Kumar 4 years ago

If mass is double than kinetic energy get double

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Why is the weight of an object on the moon 1/6 it's weight on the earth

Posted by Sachin Sandela 4 years ago

CBSE > Class 09 > Science

1 answers

Amit Sharma 4 years ago

Because the mass of moon is less than earth therefore the gravitational force of moon is less because Mass is directly proportional to the gravitational force

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?????? ??? ???? ????????

Posted by Mr. Deepak 4 years ago

CBSE > Class 09 > Science

2 answers

Juhi Pandey 4 years ago

I hope you need this answer?

1Thank You

Juhi Pandey 4 years ago

A mole is a unit of measurement used to measure the amount of any fundamental entity (atoms, molecules, ions) present in the substance.

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Plss tell me which type of quote should I write motivational, romantic, attitude, emotional, happy life

Posted by Âťťíťůđē Bøý 4 years ago

CBSE > Class 09 > Science

3 answers

Juhi Pandey 4 years ago

Motivational and happy life?

1Thank You

Nandita Maity 4 years ago

Emotional and happy life

1Thank You

K_Hushii 🍁 4 years ago

Motivational & emotional.........?baki as u wish

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Kerala lost so sad news

Posted by Âťťíťůđē Bøý 4 years ago

CBSE > Class 09 > Science

2 answers

Deepanshu Ninaniya 4 years ago

Class 9 ka ch 13 ka exercise ka question 5

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K_Hushii 🍁 4 years ago

Ha....bro

1Thank You

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If atoms are electrically neutral and all objects are made of atoms then why the objects carry charge in them?

Posted by Disha Mahintamani 4 years ago

CBSE > Class 09 > Science

2 answers

Reetika Mewade 4 years ago

When an atom loose or gain electron then they carry positive or negative charge respectively.

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Sanket ... 4 years ago

Protons are tightly bound in the nucleus and can be neither gained nor loss. So any change in the charge of an atom is due to changes in its electron count ....

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Calculate the force of gravitation between the earth and the sun, given that the mass of the earth =6*10^24kg and of the sun =2*10^30kg.the average distance between the two is 1.5*10^11

Posted by Bhawannanan Jhgbab 4 years ago

CBSE > Class 09 > Science

1 answers

P Meghana 4 years ago

53.36*10^32

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Let us assume that our galaxy consists of 2.5 x 10^11 stars each of one solar mass. How long will a star at a distance of 50,000 ly from the galactic centre take to complete one revolution? Take the diameter of the Milky way to be 10^5 ly.

Posted by Sanket ... 4 years ago

CBSE > Class 09 > Science

1 answers

Raushan Kumar 4 years ago

2pi50000ly

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What is the work to be done to increase the velocity of a car from 30 km h^-1 to 60 km h^-1 if the mass of the car is 1500 kg?

Posted by Adarsh Choudhary 4 years ago

CBSE > Class 09 > Science

2 answers

Kashish Khan 4 years ago

156250 J

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Sanket ... 4 years ago

Change in kinetic energy ...... K.E = 1/2 m ( v^2 - u^2 )

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An astronaut carried a pot containing soil weighing 60 N from the earth to the surface of moon. He kept it there and just before the return journey from moon to earth he weighed the soil on the surface of moon and found that it was only 10 N. Why did its weight decrease and how much was the loss in mass of the soil? (Searth 10 ms) (Smoon Bearth/6)

Posted by Sumit Mistri 4 years ago

CBSE > Class 09 > Science

2 answers

Disha Mahintamani 4 years ago

Mass is constant at every place so the mass of the soil did not decrease

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Disha Mahintamani 4 years ago

Because g depends on location so weight is also depend on location. The mass of the moon is less than earth so its force of attraction is also less on the pot than the earth. Weight of an object on the moon is 1/6 of weight of an object on the earth

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What is the difference between velocity and acceleration?

Posted by Vansh Tickoo 4 years ago

CBSE > Class 09 > Science

1 answers

Sandeep Singh 4 years ago

Velocity is the displacement covered by a body in per unit time but acceleration is the changing of velocity in per unit time

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SWEET AS SUGAR, HARD AS ICE, HURT ME ONCE I WILL KILL U TWICE

Posted by Âťťíťůđē Bøý 4 years ago

CBSE > Class 09 > Science

5 answers

Mayank Mannat 4 years ago

Wah bhai wah ???????

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Vanshika Nehra 4 years ago

????

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Priyanshu Thakur 4 years ago

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Sanket ... 4 years ago

?????

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Mayank Mannat 4 years ago

??????‍♀️?‍♀️?‍♀️?‍♀️?‍♀️

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NO LOVE NO PAIN STAY SINGLE ONLY GAIN KIDS HAVE CRUSHES BOYS HAVE GIRLFRIENDS BUT LEGEND R ALWAYS SINGLE

Posted by Âťťíťůđē Bøý 4 years ago

CBSE > Class 09 > Science

5 answers

Nandita Maity 4 years ago

Right

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Sanket ... 4 years ago

?.......

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Âťťíťůđē Bøý 4 years ago

Yupo

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K_Hushii 🍁 4 years ago

Ya u are absolutely right......?

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Mayank Mannat 4 years ago

Have crushes are correct but having one girlfriend and broke her heart is not correct So if you want to single for lifetime so be single but don't broke heart of any girl......

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