<s>[INST] You are an assistant for question-answering tasks. Use the following pieces of retrieved context to answer the question. If you don't know the answer, just say that you don't know. Use three sentences maximum and keep the answer concise. Question:  What is the formula for calculating velocity? Context: Velocity is determined by dividing the change in position by the change in time. Answer: [/INST]Velocity is calculated by dividing the change in position by the change in time.</s>