PHYS 101 Midterm: PHYS 101 Midterm 2d 2002

• School: McGill University
• Department: Physics
• Course: PHYS 101
• Professor: All

Document Summary

For questions 2 and 3, please show complete solutions and explain your reasoning, stating any principles that you have used. For each of the following five questions, please circle one answer only. (i) What fraction of its kinetic energy is rotational: 1/3, 2/3, 1/2, 3/4, 2/7 (ii) a 5. 0-m radius playground merry-go-round with a moment of inertia of 2000 kg m2 is rotating freely with an angular speed of 1. 0 rad/s. Two people, each having a mass of 60 kg are standing right outside the edge of the merry-go-round and step on it with negligible speed. What is the angular speed of the merry-go-round right after the two people have stepped on: 0. 40 rad/s, 0. 60 rad/s, 0. 80 rad/s, 0. 67 rad/s, 0. 50 rad/s (iii) A uniform steel rod, with a mass of 20. 0 kg and 3. 00 m long, is supported by a loose bolt attached to the wall at one end and by a wire at the other end.