Question 230: Gravitation

Question

The kinetic energy needed to project a body of mass $m$ from the earth surface (radius $R$) to infinity is

Accepted Answer

The required velocity is called escape velocity (${v_e}$) to leave the earth surface of a body.
${v_e} = $ escape velocity $ = \sqrt {2gR} $
Kinetic Energy $K.E = {1 \over 2}mv_e^2$
$	herefore$ $K.E = {1 \over 2}m 	imes 2gR = mgR$

Answer

$mgR/2$

Answer

$2mgR$

Answer

$mgR$

Answer

$mgR/4$

Gravitation

The kinetic energy needed to project a body of mass m from the earth surface (radius R) to infinity is

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