Describes an instructional method in secondary school mathematics applicable to physics instruction, to develop conceptual understanding of motion word problems. Distance, rate, and time are defined, used as variables and considered with relative motion as a unifying concept. (JM)

Anatomical data obtained from cadavers and from water displacement studies with living subjects were used to determine the weight, center of gravity, and radius of gyration for 16 body segments. A lead model was used to study movement patterns of the trunk section of the body. (Authors/PP)

An air-track and glider system used to demonstrate Newton's second law is described. Advantages of using the system are included. (SK)

Described is a student exercise demonstrating plant biorhythms in Albizzia julibrissin. Initial preparation and methods for conducting the exercise are explained, and sample data graphs are included. (CS)

This is a discussion of the conservation of angular momentum of the human body engaged in somersaults and twists. The principle is also applied to a cat turning over in midair. The events occur in the absence of torques. Application of the maneuvers are suggested for astronauts. (SA)

Describes a variation of the familiar laboratory investigation on the spring and mass oscillator. (SK)

This paper gives an account of research on the structure of turbulence close to a solid boundary. Included is a method to study the flow close to the wall of a pipe without interferring with it. (Author/JN)

Shows how through proper handling of the nonuniform motion of semiclassical coordinates spurious excitation terms are eliminated. An application to the problem of nuclear Coulomb excitation is presented as an example. (HM)

Focuses on some associations between movement and social relations using as an example the dance-play (nkwa) of the Ubakala Igbo of the former Eastern Region of Nigeria. Discusses how the dance is used to promote self-identity, prescribe and assert social values and roles, and mediate between persons and their situations. (JMF)

Describes a student investigation of a reverse flame in a atmosphere of methane that won second place in the physics division of the International Science and Engineering Fair. Includes a discussion of falling and fracturing behavior, specifically dealing with chimneys, trees, pencil point, stirring rods, and chalk. (BT)

Discusses several different methods that performers (divers and trampolinists) use to initate somersaults and twists and presents concrete examples of each method. Presents and evaluates quantitative calculations using information about the moments of inertia, mass, etc., of "typical" performers. (Author/GA)

The author argues that a Lagrangian that yields equations of motion for a damped simple harmonic oscillator does not describe this system, but a completely different physical system, and constructs a physical system that the Lagrangian describes and derives some of its properties. (Author/GA)

Investigates the "photographic" appearance of a cube moving at relativistic speeds, and shows that it depends upon whether the camera is held fixed with the optic axis perpendicular to the direction of motion or panned to follow the cube as it moves. (Author/GA)