You are presented with the quiz "An object that can be used for measuring mass of an object is similar to what playground item?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "abalance is used for measuring mass of an object" and "beam balances, like a seesaw, measure an unknown mass by comparison to known masses". 

So, what's the best answer to the question?


 

    Seesaw       