You are standing in the middle of a frozen lake. There is no wind and the ice is so smooth it is frictionless. You are carrying a slingshot and 100 marbles each with a mass of 0.05kg. Your sling shot requires 250 N/m to pull it back and you have a reach of 1 m. Estimate your final velocity after you have shot all the marbles one at a time. Would you get any benefit (increased velocity) by shooting more than one marble at a time? Explain.