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Awadhesh Thakkar asked a question
Subject: Physics, asked on on 12/11/16
two bodies of respective masses m and M are placed at a distance d apart the gravitational potential at the position where the gravitational field due to them is zero is what ? plz dont give links
Harsh Anand asked a question
Subject: Physics, asked on on 27/12/18
Two blocks of masses m each are hung from a balance as shown in the figure. The scale pan A is at height H1 whereas scale pan B is at height H2 . Net torque acting on the rod of pan, will be (length of the rod is L and H1 & H2 <<R) (H1>H2)
Almas asked a question
Subject: Physics, asked on on 9/4/17
Two stars each of mass M and radius R are approaching each other for a head-on collision. They start approaching each other when their separation is r >> R. If their speeds at this separation are negligible, the speed v with which they collide would be :-
​Answer is - v = [Gm (1/2R - 1/r)]1/2
Shubhrajyoti Ghosh asked a question
Subject: Physics, asked on on 18/12/16
An artificial satellite is revolving at a height of 500 Km above the surface of the earth in circular orbit,completing one revolution in 98 minutes. Calculate the mass of the earth. Given = 6.67 * 10-11  N.m2.kg-2 and Re = 6.4 * 106 m
[answer := 5.62 * 1024 kg ]
NO LINKS PLEASE
Mansoor asked a question
Subject: Physics, asked on on 14/9/17
Find the distance of a point from the earth's centre where the resultant gravitational field due to the earth and moon is zero.The mass of the earth is 6.0*10^24 kg and that of the moon is 7.4*10^22kg . The distance b/w earth and the moon is 4*10^5 km. 
Akansha asked a question
Subject: Physics, asked on on 22/5/16
why sometimes gravity be taken as negative?
Krishna Vamsi asked a question
Subject: Physics, asked on on 17/11/16
quick answer please 
Three objects each of mass 'm' are placed at the corners of an equilateral triangle of side 'l' . What is the gravitational force acting on each mass due to other masses is 
1) Gm23l22) 3Gm22l23) 3Gm2l24) Gm2l2
Abinanth.t asked a question
Subject: Physics, asked on on 13/5/17
Consider a planet moving around a star in an elliptical orbit with period T. The area of elliptical orbit is proportional to
a)T4/3
b)T2/3
c)T1/2
d)T
give solution?
Isha asked a question
Subject: Physics, asked on on 7/10/17
write two uses of polar satellite?
Krishna Vamsi asked a question
Subject: Physics, asked on on 17/11/16
please answer quickly 

Q. When two identical sphere are kept in  contact, the gravitational force between them is F. If two sphere of same material but with 
twice the radius are radius are kept in contact, then  the gravitational force between them would be 
1) F/4 
2) 4F
3) F/16 
4) 16F
Vijendra Kumar asked a question
Subject: Physics, asked on on 28/7/17
At what height above the surface of the earth the wt. of a man will be 20kg, if his weight on the surface of earth is 80kg.
Sai Prasad B asked a question
Subject: Physics, asked on on 15/1/17
A fixed sphere of radius R and uniform density ρ has a spherical cavity of radius R/2 such that the surface of the cavity passes through the centre of sphere . A particle of mass m is located at the centre A of the cavity. calculate
a) the gravitational potential at A
b) the gravitational field at A
c) the velocity with which the particle strikes the centre O of the sphere( neglect earth's gravity)
Krishna Vamsi asked a question
Subject: Physics, asked on on 20/11/16
​3 quetion please
Ekta asked a question
Subject: Physics, asked on on 24/10/16
sir i m ekta can i ask a doubt ?
Bhavya Arora asked a question
Subject: Physics, asked on on 6/10/17
Moment of inertia of rod about an axis perpendicular to its and passing through its centre is equal to ML^2/2 . Find moment of inertia of rod about an axis perpendicular to its passing through its 1 end.
Varun Gupta asked a question
Subject: Physics, asked on on 10/9/17
Two concentric circles spherical shells P and Q made up of same material have radii 'a' and '2a' respectively. If the mass of the shell P is M, then calculate the gravitational potential at the point A( point A lies between the shells P and Q).
Isha asked a question
Subject: Physics, asked on on 7/10/17
when a planet revolves around sun,when is its kinetic energy max.?
Rajesh asked a question
Subject: Physics, asked on on 26/12/17
why is gravitational potential negative
Kumud asked a question
Subject: Physics, asked on on 15/1/17
​why erth n sun pull d body in difeerent directions during day and in the same directions during the night  
Abinanth.t asked a question
Subject: Physics, asked on on 11/5/17
A simple pendulum has a time period 5 swhen on the Earth's surface and 10 swhen it is taken to a heighthabove the surface of the Earth. Thenhis equal to
  • A)R
    B)R/2
    C)2R/3
    D)3R/2

    plzsolve this sir using g'= g ( 1 - 2h/R) and not g' = g R^2/ (R+h)^2
    we should get the same ans but i am not getting the same ans?help

  • R2
  • 3R2
Krishna Vamsi asked a question
Subject: Physics, asked on on 20/11/16
13 and 14 quetions please.tomorrow is my exam so please send them quickly
Krishna Vamsi asked a question
Subject: Physics, asked on on 17/11/16
14) The mass of a planet is 125th of the mass  of the earth . The distance between the planet and the earth is 6×108 m. At what distance from the earth , the gravity becomes zero
1) 1×104m
2) 0.32× 10m4
3) 5× 104 m
4) 0.032 × 104 m
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