jee-main 2025 Q7

jee-main · India · session2_04apr_shift1 Work done and energy Work done by gravity in specific scenarios

Q7. To project a body of mass $m$ from earth's surface to infinity, the required kinetic energy is (assume, the radius of earth is $R _ { E } , g =$ acceleration due to gravity on the surface of earth):
(1) $2 m g R _ { E }$
(2) $4 m g R _ { E }$
(3) $m g R _ { E }$
(4) $1 / 2 m g R _ { E }$

Q7. To project a body of mass $m$ from earth's surface to infinity, the required kinetic energy is (assume, the radius of earth is $R _ { E } , g =$ acceleration due to gravity on the surface of earth):\\
(1) $2 m g R _ { E }$\\
(2) $4 m g R _ { E }$\\
(3) $m g R _ { E }$\\
(4) $1 / 2 m g R _ { E }$

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