Reading due Tuesday, November 18, 2008 at 8:30 a.m
Read Reese Chapter 10.0 - 10.9, 10.13 - 10.17 and answer Reading Questions 10 on the Web.
Homework due Tuesday, November 25, 2008 at 4:00 p.m. due to scheduling change. Note that homework is due on Monday, not on Tuesday, for this assignment Homework should be placed in the box outside of the professor's office (Nielsen 343) by 4:00 9.m.
Chapter 10:
Questions: 2, 3, 6, 9, 18, 19
Problems: 2, 12, 13, 18, 22, 26, 32, 52
Problems A and B: These problems must be solved using the Context-Rich Problem Solutions Outline. Please print copies of the worksheet from the web and use them to solve these problem.
Problem A: You are watching some kids play on a metal merry-go-round at the park when you
overhear one of the kids proclam, "This thing must weigh a ton." You begin to wonder how
much the merry-go-round really does weigh. When the kids leave, you walk up to the
merry-go-round and observe that it is about 13 feet in diameter. You stand beside the
merry-go-round, and while keeping your feet in one place, push it along the outer rim as
hard as you can with just your arms for about one second. Your then observe that it spins
at a rate of one revolution every three seconds. You know that in the gym you can lift
about 150 lbs when you push really hard with just your arms.
Problem B: You are designing a prank for a Halloween party. This prank consists of a bag
filled with Jello that you will want to fall on top of your friend's head. Because you
don't want to hurt your friend with the Jello bag, you want to make sure that the bag
is only traveling at a rate of 3.0 m/s when it hits your friend. You attach the bag of
Jello to a light string and loop the string over a pulley. The other end of the string
is attached to a bag filled with sand, called the counterweight. The bag of Jello has
a mass of 0.45 kg. The pulley has a mass of .33 kg and a radius of .20 m. The pulley
is mounted 1.5 meters above the point where it will hit your friend on the head. What
should be the mass of the counterweight so that the Jello bag will not hurt your friend
when it hits?