Change in speed of satellite

[rohanlol7]

a satellite is in circular orbit around the sun. which requires a greater change in speed: the satellite to fall to the sun or to escape the solar system

Homework Equations

f = gmm/r^2

The Attempt at a Solution

Calculated the escape velocity as(2 GM/R)^0.5
how do i find the speed required so that it falls down to the sun ?

 

[BvU]

Hi Rohan,

Escape velocity is a speed, not a change in speed...
You didn't use the

is in circular orbit around the sun.

at all !

What would happen if the satellite speed would be reduced ?

 

[rohanlol7]

Hi Rohan,

Escape velocity is a speed, not a change in speed...
You didn't use the
at all !

What would happen if the satellite speed would be reduced ?

if the speed decreases the size of the orbit decreases and it'll eventually fall into the sun ?

 

[gneill]

Why does the satellite maintain its distance from the Sun while orbiting?