Minecart Issue

I was trying to make a automatic sugarcane farm and I was intending on using a minecart hopper but when I tried to get the minecart to move without being in it, it wouldn't budge not even with power rails. Idk if this is a bug/issue or if its disabled for some reason?

In order to get the minecart to begin moving, it needs momentum, so try making one of the ends have an angle. I attached an example image below. Also, please remember that AFKing at automatic farms is against the rules!

Okay thank you! I am not intending on afking this farm just running it while im on and around it when i play! thank you!