Estimate the kinetic energy necessary for a projectile with mass m can "escape" from the surface of a planet if it is launched vertically upward. express your estimation in terms of g which is the acceleration due to gravity at the planet's surface and rp which is the planet's radius. ignore air resistance.
a. the kinetic energy is about than 2mgrp.
b. the kinetic energy greater than mgrp.
c. the kinetic energy is about than 2mr2p/g.
d. the kinetic energy greater than mr2p/g.
Answers: 2
(Correct Answer is B), in order to escape.
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