Force 12/11 LT: I will be able assess my understanding of forces Vocabulary: Gravitational, contact and normal forces Atwood machine Agenda Go over review questions Conceptual test—get your white boards Test on Monday Dec 14 Homework: Study A refrigerator is placed on a ramp. The refrigerator begins to slide when the ramp is raised to an angle of 34 degrees. What is the coefficient of static friction? .67