(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

By considering the gravitational potential energy of an object at the surface , find an expression for the escape speed from the surface and determine its value.

2. Relevant equations

GPE= mgh

3. The attempt at a solution

KE= 1/2* m * v^2

GPE= mgh

GPE+ KE = 0

mgh = - 1/2 * m * v^2

gh= - 1/2 * v^2

v^2= -2gh

v= sqare root of (-2gh)

this is the escape velocity...

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# Homework Help: Escape speed

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