Over the last three decades, many studies have been conducted to identify students' preconceptions on various science topics. It is time now for a synthetic study of preconceptions to enhance our understanding of students' everyday cognition and to benefit our effort in developing effective instructional inventions for conceptual change. Through a…

Applies the concepts of kinematics and conservation of mechanical energy to calculate the time needed to reach a certain point along semicircular and parabolic paths. Presents numerical calculations for the critical speed thresholds for the paths of semicircular and parabolic curves. (JRH)

Describes the physics of what happens when a single vehicle rolls over on its side during the process of turning in an arc. (JRH)

Situations describing Einstein's Equivalence Principle phrased in prerelativistic Newtonian concepts are presented. (KR)

Two ways to visually enhance the concept of space curvature are described. Viewing space curvature as a meterstick contraction and the heavy banana "paradox" are discussed. The meterstick contraction is mathematically explained. (KR)

Uses the teaching method of models or analogies, specifically the model called "Piekara's chair," to show how teaching classical mechanics can familiarize students with the notion of energy levels in atomic physics. (MDH)

Suggests seven take-home experiments geared toward the topic of energy that can be utilized in large, general-education physics classes that do not include laboratory sessions. An appendix provides details for the experiment to measure the heat of fusion of water. (MDH)

Discusses the science of roller coasters, relating gravity, potential/kinetic energy, inertia, and centripetal force to the various parts of the ride, providing tips on linking classroom discussions to field trips. Includes sample student activity sheet and source for additional units using amusement park rides/playground activities to teach…

Describes an experiment where elementary students determine the optimum angle of inclination for the greatest amount of distance a marble will roll when accelerated down an inclined plane. (PR)

The teaching of physics principles by drawing examples from African students' surroundings in a cross-cultural environment is discussed. The concepts of pressure, center of gravity, and the action of salt on melting are described using examples that Nigerien students would understand. (KR)

Describes the use of the Texas Instruments' calculator-based laboratory (CBL) and Vernier accelerometer for measuring the vector sum of the gravitational field and the acceleration of amusement park rides. (JRH)

Describes a system of interactive astronomy whereby nonscience students are able to acquire their own images from a room remotely linked to a telescope. Briefly discusses some applications of Charge-Coupled Device cameras (CCDs) in teaching free fall, projectile motion, and the motion of the pendulum. (JRH)

Explores the motion of a simple projectile, with emphasis on the critical angle at which radial oscillation begins and the return ellipse. Provides ideas for demonstrations of radial oscillations in the classroom. (JRH)

Describes an experiment that uses the ultrasonic transducer for demonstrating the Fourier components of waveshapes such as the square and triangular waves produced by laboratory function generators. (JRH)

Presents a mechanical model that is able to duplicate the torque-free twist of a real cat. Discusses results of experiments that analyze its free fall from an inverted position. (JRH)