Answer:
4.5 metres
Explanation:
Using Hooke's Law ([tex]F\propto x[/tex])
We need to find the spring constant of the bungee cord with the given extension and force, we can do this by substituting in known values.
[tex]600=3k\\k=200[/tex]
Now we have found the spring constant of the bungee cord, we can substitute it in for the a different force. As the cord is the same we can use the same spring constant.
[tex]900=200x\\x=4.5[/tex]
