- #1

Helly123

- 581

- 20

## Homework Statement

Gravitational force exerted on mass

*m*is GMm/r^2

*2*. Relevant equationsOrbital velocity at distance R from Earth = ##\sqrt gR##

Escape velocity = ##\sqrt 2gR##

gR = GM/R

Fc = mV^2/R

F =m.a

## The Attempt at a Solution

1) express acceleration of gravity in terms of G, M , and R

F = m.a

a = F/m = GM/r^2

2) velocity of satellite at distance R from Earth's surface

I thought v = ##\sqrt gR##

But it is wrong.

I thought it is mv^2/R = GMm/R

3) mechanical energy for satellite in terms of G, m, R and EP at distance r infinity = 0

So, left EK. But i have to find the v first

Can i get a clue?