Download or read book Discover! Work & Machines (ENHANCED eBook) written by Ron Simmons and published by Lorenz Educational Press. This book was released on 2000-09-01 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Activities explore the effects of simple machines. Lessons focus on the concepts of force, friction, gravity, and inertia. General background information, suggested activities, questions for discussion, and answers are included. Encourage students to keep completed pages in a folder or notebook for further reference and review.