<p>Worksheet 1 Leader: Nevin Week 2 Day 3 Course: Phys 221 Supplemental Instruction Instructor: Whisnant Iowa State University Date: 01/28/2016</p><p>You need to design an airplane propeller for your upcoming summer internship. It has to turn at 2400 rpm. The forward airspeed of the plane is to be 75 m/s. The speed of the tips of the blades through the air cannot exceed 270 m/s. What is the maximum radius the propeller can have? What is the acceleration of the propeller tip?</p><p>A computer disc drive is turned on starting from rest and has constant angular acceleration. If it took .750 s for the drive to make its second complete revolution, how long did it take to complete its first revolution. What is the angular acceleration?</p><p>What is our mathematical model for relative motion?</p><p>1060 Hixson-Lied Student Success Center v 515-294-6624 v [email protected] v http://www.si.iastate.edu A flat car is travelling to the right at 13.0 m/s relative to the observer. Someone is riding a scooter on the flat car? What is the velocity of the motor scooter relative to the flat car if its velocity relative to the observer is 18 m/s to the right? 3 m/s to the left? 0? </p>