Why wouldn't you say тарелка instead of тарелку?
Because «тарелка» is nominative, and since accusing the plate of being seen by you, the accusative form of «тарелку» is in order.
What a creative sentence...
Why is it that the verb of the sentence "вижу" and the object "тарелку" end by the same letter "у"? Is this a coincidence, or does the object adjust it's ending based on the verbs? :)
Why y and not a