Question

A rocket is fired vertically upwards with a speed of v=(=5km/s) from the surface of earth. It

goes up to a height h before returning to earth. At height h a body is thrown from the rocket

with speed vo in such a way so that the body becomes a satellite of earth. Let the mass of the

earth, M=6 1024kg; mean radius of the earth, R=6.4 106m; G=6.67 10-11 Nm2kg-2

; g=9.8m/s



.i) The energy to be spent in taking the satellite out of the gravitational field of the earth is (mass of the

satellite is 200kg).

a) 5.0 109J

b) 10.0 109J

c)2.5 1010J

d)5.0 1010J


ii) If this satellite is to be taken at double of the present height from the surface of the earth, then the new

time period of revolution is –

a) 9330 s

b) 20080 s

c) 11000 s

d) 29400 s​

Answer 1

Answer:

jcjjcfxjf

satellite is 200kg(1)