I’ve rewad people on here talking about prehopping and how it gets you to do higher hops. question- how do you do it?
start further away from the object, jump towards it, push down harder and you will jump higher
It isnt the fact that you’re jumping towards the object that makes you go higher, the prehop gives you more downwards push, and as every action has an equal and opposite reaction, the harder you push down, the higher you will go up! 
(physics revision :()