9/27/13, Friday

Post date: Sep 27, 2013 2:11:33 AM

Bell ringer

• • A 225 N steel box slides down a 25^o steel ramp. How much frictional force acts on the box from the ramp?

Activities

• • Force problems, general procedure

  • Advanced friction problems

Practice

• • Box on table connected by string to box falling

  • Object on ramp with friction

Assignments

• • P.145-149: 9, 10, 19, 20, 22, 31, 35, 38, 48, 50 (due Monday)

Announcements

• • Chapter 4 test Tuesday

  • Air resistance lab due Tuesday