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With what velocity must a body be proj...

With what velocity must a body be projected vertically upwards from the surface of the earth in orer that it may never return to the earth ? (`G = 6.66 10 ^(-11) ` SI units , mean density of the earth = `5.525 xx 10^(3)` `kg m^(-3)` , radius of the earth = `6.38 xx 10 ^(6) `m.)

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The correct Answer is:
`1.12xx 10 ^(4) ms ^(-1)`
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