GravitationHard
Question
The mass of a spaceship is 1000 kg. It is to be launched from the earth′s surface out into free space. The value of ′g′ and ′R′ (radius of earth) are 10 m/s2 and 6400 km respectively. The required energy for this work will be :-
Options
A.6.4 × 1010 Joules
B.6.4 × 1011 Joules
C.6.4 × 108 Joules
D.6.4 × 109 Joules
Solution
K.E. + P.E. = 0
K.E. = P.E. =
= mgR
= 103 × 10 × 64 × 105
= 6.4 × 1010 J
K.E. = P.E. =
= mgR
= 103 × 10 × 64 × 105
= 6.4 × 1010 J
Create a free account to view solution
View Solution FreeMore Gravitation Questions
The angular speed of earth in rads/s, so that bodies on equator may apper weightless is : [Use g = 10m/ s2 and the radiu...Energy required to move a body of mass m from an orbit of radius 2R to 3R is...Two particles of equal mass m go round a circle of radius R under the action of their mutual gravitational attraction. T...The increasing order of the ionic radii of the given isoelectronic species is :-...A satellite S is moving in an elliptical orbit around the earth. The mass of the satellite is very compared to the mass ...