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The escape velocity of a projectile on ...

The escape velocity of a projectile on the earth's surface is `11.2 kms^(-1)` . A body is projected out with 4 times this speed. What is the speed of the body far way from the earth?

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`v=sqrt(v_p^2-v_e^2)=sqrt((3V_e)^2-v_e^2)=sqrt8xx11.2=31.68kms^(-1)`
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