I have a question that I must answer, and am finding it difficult to get. It is probably easy, my brain is just not functioning. It is higshchool phsyics question. Anyways how to get the answer and any advice would be great. Thanks! Question: Suppose a stone of mass 350 g is thrown straight up from the ground with kinetic energy of 9.8 J (EK= 9.8J). How high will it rise before it starts to come down again?