Describes an experiment in which an air table is used to measure the moment of inertia of air pucks with various radii and mass loadings. (BT)

Discusses the effect of vehicle mass on stopping distances. Analyzes an example of a sample vehicle and tire, and calculates the braking acceleration showing the effect of different factors on the stopping performance of the tires. (GA)

Describes the design of an experiment that is used to determine the acceleration of an accelerating system with the help of an airtrack and a pendulum. (GA)

Describes the following: a device which converts the displacement of a pendulum into an electric signal and is used as a voltage generator of low frequencies; a turn-by-turn transformer demonstration; how to remove the buoyant force on a piece of cork immersed in water; and how to demonstrate Coulomb's Law on the overhead projector. (GA)

This article discusses the species designation and taxonomies of Delaware and Algonkian and presents eight classifications of taxa by form, habitat, color, movement, sound, use, relationship, and appearance. Relevant research is also reviewed. (CLK)

Explores sex and age differences in the level of object representations and human movement in the dreams of adolescents. Dream analyses from 106 adolescents reveal significant differences in quality of object representations in male and female adolescents' dream content. Females' dreams contained significantly higher amounts of human movement than…

Explains that in dynamics, the process of finding the direction of force acting on a moving object can be structured as a syllogism. Uses the syllogistic form of a scientific explanation task to help middle school students change their prior conceptions about force and motion. Reports four factors preventing students' use of deductive reasoning.…

Three experiments investigated discrimination and memory of 5.5-month-olds for videotapes of women performing different activities (blowing bubbles, brushing hair, brushing teeth) or static displays after a 1-minute and a 7-week delay. Findings demonstrate the attentional salience of actions over faces in dynamic events to 5.5-month-olds. Findings…

Considers the translation from Latin of Newton's First Law (NFL) in an historical perspective. Shows that Newton's original yields two versions of complimentary meanings, one temporal and the other quantitative. Reviews the presentation of NFL in physics textbooks and notes a decline in the status of NFL in the physics curriculum. (Contains 72…

Compares junior high school students' conceptual changes about force and motion and their interest in science between a group whose instruction including sports experiential learning activities and a group who used traditional instruction. Examines students' conceptual changes and interests according to the degree of their sports experience before…

Investigated was the nature of teachers' ideas about force and gravity, changes in materials, and energy. Information was obtained by using interview-about-events and interview-about-instances techniques. Examples of teachers' conceptions and ways of thinking are included. (YP)

Explores the basic physical laws of the juggling activity. Derives some equations involving height, angle, time, and distance for common juggling objects. Describes the relationships among height, length, mass, number of clubs, number of spins, angular velocity, time, and angle in club juggling. (YP)

Described is a mechanically driven device for generating three-dimensional harmonic space figures with different frequencies and phase angles on the X, Y, and Z axes. Discussed are apparatus, viewing stereo pairs, equations of motion, and using space figures in classroom. (YP)

Rhythmic groups of cyclical movements--action cycles--were identified during interactions between adults and subjects (12 children, aged 8-18, and 6 young adults with profound mental handicap). Subjects performed similar actions for apparently similar reasons at similar rates to their caregivers, giving strong indication of a biologically robust…

Evidence is presented negating the theory that gravitoinertial force is perceived. It is suggested that spatial orientation is based on information derived from patterns of motion of the organism, the surface of support, and compensatory actions of the organism. Recommendations for further research are outlined. (SLD)