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A space ship is fired from the earth's s...

A space ship is fired from the earth's surface with an intial speed of `2xx10^(4)m//s.` Its speed when it is far from the earth is
`(g=9.8m//s^(2),R=6.4xx10^(6)m)`

A

`1.78xx10^(4)m//s`

B

`1.66xx10^(4)m//s`

C

`1.55xx10^(5)m//s`

D

`0m//s`

Text Solution

Verified by Experts

The correct Answer is:
b
Initial total energy = Final total energy
`(1)/(2)m u^(2)-("GMm")/(R)=(1)/(2)mv^(2)+0`
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