A satellite of mass m is orbiting the earth in a circular orbit of radius r.It starts loosing energy due to air resistance at the rate of C J\s.Then what time taken by the satelite to reach the earth.

2 years ago


Answers : (2)


initial energy= -GmM/2r, M is mass of earth,

let a be radius of earth

satellite will reach earth when its energy reduces to -GmM/2a

2 years ago

Then answer is -(GMm/C) (1/r-1/R) = t Where M ans R r the respective mass and radius of the Earth. 

2 years ago

Post Your Answer

More Questions On IIT JEE Entrance Exam

Ask Experts

Have any Question? Ask Experts
Post Question
Answer ‘n’ Earn
Attractive Gift
To Win!!!
Click Here for details
from where can i dwnld iit mathematics by a das gupta or rd objective?
hello dear student, http://www.askiitians.com/important-books-iit-jee.aspx , read this article all good books are mentioned , it is best for your query.
Sher Mohammad one month ago
Sir, -How rank is decided in jee advanced? -Is it decided only on marks that we get in jee advanced paper?
It’s decided solely on the basis of the marks you secure on the JEE Advanced paper. Thanks & Regards Aziz Alam IIT Roorkee askIITians
Aziz Alam one month ago
sir, i got ee in iit patna.. and unluckily expecting a rank of around 30000 in mains. and therefore will get nit durgapur it. what should be my choice??? btw i am also getting ee in jadavpur...
If you have EE in IIT Patna and your possible options include NIT Durgapur and EE in Jadavpur University, it’s better that you stick with EE in IIT Patna. And if you are thinking about...
Aziz Alam one month ago
I expect a rank of 300-400 in advanced. which branch is having better scope. mechanical engg at bombay or cs at kharagpur etc.
You should go with cs at khargpur if you want to earn lot of money, and mechanical engg is also a good branch. sher mohammad b.tech, iit delhi
Sher Mohammad 3 months ago
CS at IIT Kanpur or IIT KGP.
AKSHAT BHANDARI 3 months ago
A body is projected vertically upwards. At its highest point it explodes into 2 pieces of masses in the ratio 2:3 and the lighter piece flies horizontally wih a velocity of 6metre per...
Dear student, Let the body be projected with a velocity v along the vertical direction. The height reached by the body be given by: The the mass of the body be 5m kg. So the initial momentum...
Sumit Majumdar 19 days ago
How do shift to cse in the second yr if I hav taken ee or etc in the first yr in an nit?
It is quite difficult to change branch after first year.. You have to be in top 10 of all the students in 1 st year to do so.. So you know it is quite difficult to do it.. Thanks &...
bharat bajaj 2 months ago
View all Questions »