The time period of a satellite is 5 hours. If the separation between the earth and the satellite is increased to 4 times what will be the new time period?

a) 20 hrs
b) 10 hrs
c) 80 hrs
d) 40 hrs

Question

The time period of a satellite is 5 hours. If the separation between the earth and the satellite is increased to 4 times what will be the new time period?

a) 20 hrs
b) 10 hrs
c) 80 hrs
d) 40 hrs

anonymous · Answer

20h i guess

mayankdevnani · Answer

it is absolutely wrong sis?   @ShikhaDessai

mayankdevnani · Answer

@amistre64        @Callisto     @pratu043       @inkyvoyd      @eyust707     @rajathsbhat       @Aperogalics     @sirm3d      @Shadowys      plz help me guys:)

anonymous · Answer

i'm not sure........never solved this kind of a problem before

anonymous · Answer

kepler's third law bud.
$$\Large \frac{T_1^{2}}{T_2^{2}}=\frac{r_1^{3}}{r_2^{3}}$$

mayankdevnani · Answer

ok...then

mayankdevnani · Answer

why should we use kepler's 3 law, why should'nt we use 5*4=20 hrs

anonymous · Answer

umm because the universe obeys the law of gravity?

anonymous · Answer

let height be h first and whoose time period is 5hrs
h---->4h
by keplers third law|dw:1354629739334:dw||dw:1354629866140:dw|