3) How many Joules of kinetic energy does a 16 pound bowling ball have when rolled at the average speed of 16.5 mph? 4) How fast is a 0.148 kg iphone 8 moving when it hits the ground when dropped from a 15 foot deer stand? The phone has 6.64 Joules of kinetic energy at the ground. How many mph is this? 5) If you are at the top of the Wild Thing roller coaster (207 feet) at Valleyfair, and you drop down to 24.0 feet, how fast will you be going in mph at the bottom without any friction? 6) If a student is sledding down a hill with a height of 10.0 meters. The person and the sled weight 153 pounds. What should their velocity be at the bottom without any friction? If the velocity is only 11.5 m/s, how much work is done by friction?