how can i grow cherry tomatows in a pot

You would need to have them in a large pot, at least a 10 inch and stake them well, and NEVER let them get dry.especially in full sun or the toms will split or get blossom end rot.

Also feed regularly with a tomato fertiliser, important if they are confined in a pot,

I used to live in a house with only a yard and wanted to grow something my sister a kean gardner and def more green fingured than me planted up some cherry toms in hanging baskets they did really really well took alot of watering and fair bit of feeding too as they were also in full sun but worked really well going to do same here in new house even though have lots garden space mainly to keep slugs and other nastys away look nice too.