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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 3 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Reena Bharti 3 years, 5 months ago

Anything that occupies space & has some mass is called matter

0Thank You

Priya Tamang Golay 3 years, 5 months ago

What is matter

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ANSWER

Define atomic number and Mass number.

Posted by Júwáíríà Ñààz 3 years, 5 months ago

CBSE > Class 09 > Science

4 answers

Preksha Kanted 3 years, 5 months 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 3 years, 5 months ago

Thnks Alka

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Smile 😇 3 years, 5 months 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 3 years, 5 months 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 3 years, 5 months ago

CBSE > Class 09 > Science

5 answers

Farha Shaikh 3 years, 5 months ago

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K_Hushii 🍁 3 years, 5 months ago

Gajab bro......

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(༎ຶ Isha ༎ຶ) 3 years, 5 months ago

Supub

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Garima ❤️ 3 years, 5 months ago

Nice ?

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Mayank Mannat 3 years, 5 months ago

???????✌..

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ANSWER

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

Posted by Kashish Khan 3 years, 5 months ago

CBSE > Class 09 > Science

4 answers

Shine_ Sun._._ 3 years, 4 months ago

Banane wale ko pata hoga..😁

0Thank You

Rishu Kumar 3 years, 5 months ago

Book se

0Thank You

(༎ຶ Isha ༎ຶ) 3 years, 5 months ago

From book

2Thank You

Zoher Kalynpura 3 years, 5 months ago

What is atom

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ANSWER

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

Posted by Srijana Baraily 3 years, 5 months ago

CBSE > Class 09 > Science

4 answers

K_Hushii 🍁 3 years, 5 months ago

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

0Thank You

Siddhi Vats 3 years, 5 months ago

I think yes

0Thank You

Kashish Khan 3 years, 5 months ago

No I like it

2Thank You

Âťťíťůđē Bøý 3 years, 5 months 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 3 years, 5 months ago

CBSE > Class 09 > Science

2 answers

(༎ຶ Isha ༎ຶ) 3 years, 5 months 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 3 years, 5 months ago

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

2Thank You

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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 3 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

If mass is double what effect on kinetic energy

Posted by Payal Gurjar 3 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Dipendra Rathaur 3 years, 5 months ago

Then K.E become half

0Thank You

Raushan Kumar 3 years, 5 months 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 3 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Amit Sharma 3 years, 5 months 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 3 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Juhi Pandey 3 years, 5 months ago

I hope you need this answer?

1Thank You

Juhi Pandey 3 years, 5 months 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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ANSWER

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

Posted by Âťťíťůđē Bøý 3 years, 5 months ago

CBSE > Class 09 > Science

3 answers

Juhi Pandey 3 years, 5 months ago

Motivational and happy life?

1Thank You

Nandita Maity 3 years, 5 months ago

Emotional and happy life

1Thank You

K_Hushii 🍁 3 years, 5 months ago

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

2Thank You

ANSWER

Kerala lost so sad news

Posted by Âťťíťůđē Bøý 3 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Deepanshu Ninaniya 3 years, 5 months ago

Class 9 ka ch 13 ka exercise ka question 5

0Thank You

K_Hushii 🍁 3 years, 5 months ago

Ha....bro

1Thank You

ANSWER

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

Posted by Disha Mahintamani 3 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Reetika Mewade 3 years, 5 months ago

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

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Sanket ... 3 years, 5 months 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 3 years, 5 months ago

CBSE > Class 09 > Science

1 answers

P Meghana 3 years, 5 months 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 ... 3 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Raushan Kumar 3 years, 5 months 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 3 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Kashish Khan 3 years, 5 months ago

156250 J

0Thank You

Sanket ... 3 years, 5 months ago

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

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ANSWER

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 3 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Disha Mahintamani 3 years, 5 months ago

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

0Thank You

Disha Mahintamani 3 years, 5 months 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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ANSWER

What is the difference between velocity and acceleration?

Posted by Vansh Tickoo 3 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Sandeep Singh 3 years, 6 months 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 3 years, 6 months ago

CBSE > Class 09 > Science

5 answers

Mayank Mannat 3 years, 5 months ago

Wah bhai wah ???????

0Thank You

Vanshika Nehra 3 years, 5 months ago

????

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Priyanshu Thakur 3 years, 5 months ago

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Sanket ... 3 years, 5 months ago

?????

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Mayank Mannat 3 years, 5 months ago

??????‍♀️?‍♀️?‍♀️?‍♀️?‍♀️

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ANSWER

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

Posted by Âťťíťůđē Bøý 3 years, 6 months ago

CBSE > Class 09 > Science

5 answers

Nandita Maity 3 years, 5 months ago

Right

0Thank You

Sanket ... 3 years, 5 months ago

?.......

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Âťťíťůđē Bøý 3 years, 5 months ago

Yupo

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K_Hushii 🍁 3 years, 5 months ago

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

0Thank You

Mayank Mannat 3 years, 5 months 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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