Derive an expression for the escape velocity of a projectile fired from the surface of the earth so that it never returns back to its surface.
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When two or more bodies interact with each other, some work has to be done in assembling them together in their respective places.Total work done in assembling bodies together, in their respective places, is called gravitational potential energy of the system.Potential energy of a system of two masses is defined as the amount of work done in bringing these two masses from infinity to their respective places.
snowwhite3:
whi question
???
I don't understand what you mean.
I want derivation
if any object escape by a spreed of 11.2km/hr its free from gravitational force. such speed called escape velocity. I think this helps you. if not its better to consult your teacher.
escape velocity works on rocket , eroplanes
but what is the derivation
external force
like when a rocket takes off the fire makes the extarnal force
The derivation starts with the initial gravitational potential energy at the given altitude and the initial kinetic energy of the object. This total initial energy is then compared with the sum of the potential and kinetic energies at an infinite separation, in order to determine the escape velocity equation.
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