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January 31, 2015

January 31, 2015

Posted by **Technoboi11** on Wednesday, March 7, 2007 at 1:09am.

(a) If the probe is launched with an initial kinetic energy of 5.0 107 J, what will be its kinetic energy when it is 4.0 106 m from the center of Zero?

(b) If the probe is to achieve a maximum distance of 8.0 106 m from the center of Zero, with what initial kinetic energy must it be launched from the surface of Zero?

Use the rel;ationship

KE + Potential energy) = constant.

The potential energy at distance R from the center is

-GMm/R

M is the planet's mass and m is the probes.

That means (1/2) mV^2 - GMm/R = constant

Use that fact to compute the unknown kinetic energy in each problem

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