Describes physics formulas which can be used by law enforcement officials to determine the possible velocity of vehicles involved in traffic accidents. These include, among others, the slide to stop-level road, slide to stop-sloping roadway, and slide to stop-two different surfaces formulas. (JN)

Reproduces a study reported in 1899 that compared the relative advantages of producing handwriting through finger, full arm, and forearm movements and that concluded that the forearm movement was the best of the three. (GT)

Results of an investigation into why individuals participate in specific sport, dance, or exercise activities are given. (JD)

This study was made to determine torque-generating capabilities at two speeds in active young boys and girls for the knee and elbow flexors and extensors. (JD)

Describes a "flat" linear air track, glider and spark timer system for use in the physics laboratory. The results of experimental tests using the system are briefly stated. (SA)

Shows that the nonlinear vector product developed by the author in a previous paper to treat successive space rotations can be employed to treat the space time rotations of special relativity in which the angle of rotation is imaginary. (HM)

Shows that the basic properties of spherical harmonics follow in a simple and elegant way from the commutation relations for angular momentum operators and the commutation relations between these operators and arbitrary vector operators. (Author/HM)

Presents an activity that encourages students to think as scientists and explores microgravity. Employs a drop tower built with simple materials. (DDR)

Presents a variety of activities that support the development of an understanding of Newton's laws of motion. Activities use toy cars, mobile roads, and a seat-of-nails. Includes a scoring rubric. (DDR)

Examined the emergence of principal and secondary movements in Cuban children in their first year of life. Based on 35 examples of observed movements, an integrated program of activity is developed to assist in the development of physical skills which are essential to the development of a well-rounded personality. (AS)

Explores whether older students were less ready than younger students to change their alternative conceptions. Findings indicate that after reading a refutational text, conceptual change occurred in 35% of Year 6 students and 44% of Year 10 students. Concludes that there was no evidence to suggest that conceptual change is more difficult for older…

Investigates the effects of conceptual assignments and conceptual change discussions on high school students' achievement and misconceptions about force and motion. Analyzes pretest and posttest data from the Force Misconception and Force Achievement Tests (FMFAT). Discusses the effects on the conceptual change discussion on reducing…

Explains the origin and significance of harmonic motion which is an important topic that has wide application in the world. Describes the phenomenon by using an auxiliary circle to help illustrate the key relationships between acceleration, displacement, time, velocity, and phase. (Contains 16 references.) (Author/YDS)

Discussed are details of what is known about the composition, physical characteristics, and formation of the planet Pluto and its satellite, Charon. Alignments of these bodies and details of their rotations and revolutions are described. (CW)

Describes four kinds of movement by a cat with or without angular momentum and tail or tail-less during free falling. Presents many pictures illustrating the movement. Supports the position that the angular momentum of the tail plays an important role in free fall. (YP)