Demonstrates several objects rolling down a slope to explain the energy transition among potential energy, translational kinetic energy, and rotational kinetic energy. Contains a problem from Galileo's rolling ball experiment. (YP)

Directions for the construction of this apparatus are presented. Materials and procedures for its use are discussed. The behavior of particles in the apparatus is described. (CW)

Presents an experiment to investigate centripetal force and acceleration that utilizes an airplane suspended on a string from a spring balance. Investigates the possibility that lift on the wings of the airplane accounts for the differences between calculated tension and measured tension on the string. (MDH)

Almost all experimental investigations on concepts of time (T), distance (D) and velocity (V) since 1946 have been based on the Piagetian theory. However, there are several controversial points in Piaget's investigations. In the experiment described in this paper, developmental changes of concepts concerning relation of T, D, and V were examined…

This is the third book in a five-book physical science series on simple machines. The books are designed for Spanish-speaking junior high school students. This volume explains principles governing wheels and pulleys by suggesting experiments and posing questions concerning drawings in the book which illustrate the scientific principles. Friction…

This is the first book in a five-book physical science series on simple machines. The books are designed for Spanish-speaking junior high school students. This volume defines force and work by suggesting experiments and posing questions concerning drawings in the book which illustrate scientific principles. Answers to the questions are provided;…

This is the fourth book in a five-book physical science series on simple machines. The books are designed for Spanish-speaking junior high school students. This volume explains further refinements of the wheel which is introduced in volume three. The fourth volume explains principles behind gears and the relationship between velocity and force by…

This is the second book in a five-book physical science series on simple machines. The books are designed for Spanish-speaking junior high school students. By suggesting experiments and posing questions concerning drawings in the book which illustrate the scientific principles, this book explains the workings of three types of levers. Resistance…

This is the fifth book in a five-book physical science series on simple machines. The books are designed for Spanish-speaking junior high school students. This volume explains the principles and some of the uses of inclined planes, as they appear in simple machines, by suggesting experiments and posing questions concerning drawings in the book…

This teacher's guide is for the second year of the Portland Project, a three-year integrated secondary science curriculum sequence. The first of two parts in this volume, "Motion and Energy," begins with the study of motion, going from the quantitative description to a consideration of what causes motion and a discussion of Newton's…

Describes directions for constructing "racing" cars out of simple materials like spools and coffee cans. Discusses procedures for students to build cars, then to test and race them. Stresses that the activity allows for self-discovery of problem solving techniques and opportunities to discuss the scientific concepts related to the activity. (TW)

Describes a computer simulation of the Compton effect designed to lead students to discover (1) the relationship of the electron's final kinetic energy to its angle of scattering and (2) the relationship between the scattering angles of the outgoing electron and photon. (MDH)

This concept module on force is one of thirteen modules that provide a flexible, laboratory-based physics instructional package designed to meet the specialized needs of students in two-year, postsecondary technical schools. Each of the thirteen concept modules discusses a single physics concept and how it is applied to each energy system. This…

Investigates the construction of understanding of the motion of an object down an inclined plane which takes place through the process of model building in an integrated algebra, trigonometry, and physics class. Discusses four major themes related to student learning through modeling that emerged from the results. Discusses implications for…