1.

A body is projected up with a velocity equal to `3//4th` of the escape velocity from the surface of the earth. The height it reaches is (Radius of the earth is `R`)A. `10R//9`B. `9R//7`C. `9R//8`D. `10R//3`

Answer» Correct Answer - B
`1/2mv_(e)^(2)=(mgh)/(1+h/R)`


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