Homework # 22 - Newton's First Law Textbook: Handout Problems: 1. How does the law of inertia explain each of the following: (a) Passengers standing in a train are thrown backward when the train suddenly moves forward. (b) They are thrown forward when the train suddenly stops. (c) They are thrown to one side when the train rounds a curve. 2. Which person has the greatest inertia? Explain. (a) a 110-kg wrestler resting on a mat (b) a 90-kg man walking at 2 m/s (c) a 70-kg runner traveling at 5 m/s (d) a 50-kg girl spinning at 10 m/s 3. A highly polished block of wood is given a push that sets it sliding across a long polished floor. (a) What path does it take? (b) Why does it gradually slow down? (c) What change would take place in the motion of the block of wood if the friction between it and the floor were increased