Reading due Wednesday, October 29, 2008 at 8:30 a.m
Read Reese Chapter 8.15 - 8.20, 9.0 - 9.2, 9.4 - 9.6 and answer Reading Questions 8 on the Web.
Homework due Tuesday, November 4, 2008 at 4:00 p.m. Homework should be turned in during class or placed in the box outside of the professor's office (Nielsen 343) by 4:00 p.m.
Chapter 8:
Problems: 28, 29, 40, 43, 58, 67, 77
Chapter 9:
Questions: 9, 12
Problems: 6, 9, 12, 22
Problems A: This problem must be solved using the Context-Rich Problem Solutions Outline. Please print a copy of the worksheet from the web and use it to solve this problem.
Problem A: You are watching a friend of yours compete in a skateboard
competition. The skateboard track is horizontal and flat on the bottom
and then arcs up in the shape of a quarter-circle with radius of 5.0 meters,
so that the track is vertical at the top of the quarter-circle. Your
friend does a trick where he rides his skateboard along the flat section
then continues up the arc to the top of the quarter-circle ramp. He
stops momentarily at the top of the arc, then turns around and comes
back down the quarter-circle ramp. An official sitting next to you
is using a radar gun to measure the speed of the skaters and you notice
that at the bottom of the quarter-circle ramp your friend is traveling
9.0 m/s. You know your friend has a mass of 75 kg. You begin to
wonder what frictional force is exerted on your friend's skateboard.
You realize the you have enough information to figure this out so you
calculate the work done by friction on the skateboard and the average
frictional force on the skateboard.