Tug others along
Tie things down
Magic tricks
Climb
Swing
With a fulcrum, increase your leverage
Cross it at the finish line
Make a net
Cut it to set things free
Tug of war
Measure
Create a barrier
Knot it up
Burn yourself badly (ouch!)
Cross impossible ravines
…
In short, you can lead with it.
Just like leadership, each of these things requires you to put some tension on the rope. And just like leadership, you can’t push anything with it.