GravitationHard
Question
The mass of a spaceship is 1000 kg. It is to belaunched from the earth′s surface out into freespace. The value of ′g′ and ′R′ (radius of earth)are 10 m/s2 and 6400 km respectively. Therequired 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
PEi + KEi = PEf + KEf
-mgR + KEi = 0 + 0
KEi = +mgR = 1000 × 10 × 6.4 × 106
work done = 6.4 × 106 J
-mgR + KEi = 0 + 0
KEi = +mgR = 1000 × 10 × 6.4 × 106
work done = 6.4 × 106 J
Create a free account to view solution
View Solution FreeMore Gravitation Questions
For a satellite to be ego-stationary, which of the following are essential conditions?...The radius of Martian orbit around the Sun is about 4 times the radius of the orbit of Mercury. The Martian year is 687 ...A cavity of radius R/2 is made inside a solid sphere of radius R. The centre of the cavity is located at a distance R/2 ...A geostationary satellite is orbiting the earth at a height of 6R from the earth′s surface (R is the earth′s...Average density of the earth...