I'm am looking to create a vehicle that can break sand block, although I don't know how. I have the body, the last thing I need is a contraption that can brake sand blocks in Minecraft
Frits34000 and a couple other redditors for a good while worked on 'sand quarry' machines - you can find the assorted designs on r/redstone.
The gist of it is to lift the sand block using a sticky piston, and while it is still falling, insert a non-full block like a trapdoor into the space it's trying to land in. Unable to solidify into a regular block, sand drops as item - the machine to do just this is fairly trivial, but there are numerous caveats about making it practical.
Frits34000 published a pretty in-depth tutorial on his designs and ways of dealing with the caveats.