The disk is driven by a motor such that the angular position of the disk is defined by u = (20t + 4t 2) rad, where t is in seconds. Determine the number of revolutions, the angular velocity, and angular acceleration of the disk when t = 90 s.

ENGR 121 B Lecture Notes for 9/19/2016 Spencer Kociba Summary of Lecture: beginning to understand the vocabulary and functions in MATLAB and how we will use MATLAB and BlackBoard Learn to turn in assignments, take quizzes, etc. Goal of the course: learn to THINK like a programmer aka step by step problem solving. Problem solving techniques: ● Plan ● Restate the problem ● Divide the problem into steps or subproblems to solve ● Reduce/Simplify the problem (ex. Global scale>local scale) ● Look for similarities to other previously solved problems ○ Emotional attachment/familiarity with an idea or concept improves your memory and ability to recall information when needed ● Ex