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Tatiana [17]
3 years ago
12

A massive launcher sends a projectile vertically upwards from the surface of a planet of mass M and radius R. You may assume tha

t this planet has no atmosphere. Part A If the projectile is launched at the escape speed, how do the magnitudes of its initial KE and gravitational potential energy (GPE) compare
Physics
1 answer:
uranmaximum [27]3 years ago
5 0

Answer:

It can be shown that the potential energy of an object at the surface of the planet would be -G M / R if the potential at infinity is chosen to be zero.

Kinetic energy of G M / R would be required for the escape speed of such an object. The total energy in all such cases is zero.

This can easily be seen by considering the speed of an object falling from infinity towards the planet - the total energy will remain zero if it was zero when the object started to fall.

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