A satellite is moving with a constant speed v in circular orbit around the earth. An object of mass ‘m’ is ejected from the satellite such that it just escapes from the gravitational pull of earth. At the time of ejection, the kinetic energy of the object is :
(a)
(b)
(c)
2
(d)
A satellite is moving with a constant speed v in circular orbit around the earth. An object of mass ‘m’ is ejected from the satellite such that it just escapes from the gravitational pull of earth. At the time of ejection, the kinetic energy of the object is :
(a)
(b)
(c)
2
(d)
Question ID - 50220 | SaraNextGen Top Answer
A satellite is moving with a constant speed v in circular orbit around the earth. An object of mass ‘m’ is ejected from the satellite such that it just escapes from the gravitational pull of earth. At the time of ejection, the kinetic energy of the object is :
(a)
(b)
(c)
2
(d)
|
A satellite is moving with a constant speed v in circular orbit around the earth. An object of mass ‘m’ is ejected from the satellite such that it just escapes from the gravitational pull of earth. At the time of ejection, the kinetic energy of the object is : |
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|
(a) |
|
(b) |
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(c) |
2 |
(d) |
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1 Answer
127 votes
Answer Key / Explanation : (b) -
At height r from center of earth. Orbital velocity
=
By energy conservation
KE of ‘m’ +
=0+0
(At infinity, PE=KE=0)
⇒KE of ‘m’=
=
m=
127 votes
Answer Link
127