UNIVERSITY PHYSICS Rotating track EXP 12 - PRELAB O COLLIN www.collin.edu / physics COLLEGE String Smart pulley PRE-LAB Instructions: Rotation axis Print out these pages. Feel free to refer to the lab instructions and other materials, your physics textbook, other students, etc. to help you to ponder, understand, and work out provided. answers to the following question(s). Show your work & answers in the space(s) Base PRE-LAB Questions: 1) Explain why and how an object moving in a straight line has angular momentum. If the hanging mass is M = 100 g, and its linear acceleration is a = 2.5 m/s, what is the moment of inertia / of the rotating platform? 2) Explain how you will use Capstone to measure angular velocity and linear acceleration in this experiment. 5) Using the same rotating platform as in problem 4, a ball of mass m = 50 g is launched into the catcher on top of the platform as shown in the diagram below. After the ball is caught by the catcher, the angular velocity of the system is @ = 2.2 rad/s. Rotating track Base Ball 3 ) What constitutes "the system" whose moment of inertia you will determine in this Launcher Radius experiment? Explain. 0 TID Catcher a. Before collision b. After collision If the catcher is R = 20 cm away from the axis of rotation of the platform, what is the linear velocity v of the ball before it is caught? 4) In order to determine the moment of inertia / of a rotating platform, a string is wrapped around a spool of radius r = 2.0 cm beneath the platform. The string is then fed over a pulley with a hanging mass attached to its end as shown in the diagram below. The hanging mass is then released from rest, and its linear acceleration is measured