<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 rolling resistance of a car tire? Context: Rolling resistance of a car tire is the force that resists motion as the tire rolls on a surface. Answer: [/INST]It is the force resisting the motion when the tire rolls on a surface.</s>