The study reported in this paper developed a categorization of teacher physical motion in relation to verbal actions and analyzed two random samples of such motion as a basis for posing ten hypotheses concerning teacher nonverbal behavior. (MJB)

An automated procedure for range of motion training was tried with two cerebral palsied retarded young men. (Author/CL)

In response to conventional rocket demands on fuel supplies, electromagnetic launches were developed to give payloads high velocity using a stationary energy source. Several orbital mechanics problems are solved including a simple problem (radial launch with no rotation) and a complex problem involving air resistance and gravity. (DH)

Scientists often use the "slingshot effect" (also called the "gravity assist") of the gravitational field of a planet to increase or decrease the velocity of a spacecraft. Examples of this effect, puzzling aspects, a qualitative explanation, details of necessary calculations, a thermodynamic analogy, and other topics are discussed. (JN)

Illustrates the differences between explanations of projectile motion by a physics teacher and a baseball player. Equations are discussed and results are shown graphically. (DH)

Children's and adolescents' responses to some nonmimetic figures of motion showed that the figures become more effective in indicating direction of motion as age increases; however, at a given age, some are much less effective than others. As indicators of speed, some figures are intrinsically more effective than others. (Author/RM)

Explains the principles of the science of motion and examines Thomas Kane's deductive approach to the study of dynamics. Also recounts Kane's advances in explaining classic mechanics and discusses the advantages of his methods in the formulation of equations of motion and in applications to space technology. (ML)

Discusses the air resistance on projectiles, examining (in separate sections) air resistance less than gravity and air resistance greater than gravity. Also considers an approximation in which a trajectory is divided into two parts, the first part neglecting gravity and the second part neglecting the air resistance. (JN)

Why does a football thrown with a spin keep its axis pointing along its trajectory? (It's most obvious in a long, soft pass. Even with a wobbly pass the ball's axis wobbles around the line of its trajectory). The answer to this question is provided. (JN)

Materials from a student-made kit are used to investigate physics phenomena while riding on various amusement park rides. A list of materials contained in the kit and procedures for their use are included. (JN)

Discusses motions of the sun and earth in relation to the accuracy of clocks. Effect of eccentricity of the earth's orbit, efect of inclination of the earth's axis, and combination of these two effects are considered. The accuracy of sundials is also discussed. (DH)

If a ball were given an initial velocity in excess of its terminal velocity, would the upward force of air resistance (a function of velocity) be greater than the downward force of gravity and thus push the ball back upwards? An answer to this question is provided. (JN)

Techniques are presented to get children thinking about their body motions, thereby increasing the expressiveness of their drawings. (RM)

Describes a student project in which paper planes were designed and flown to investigate the effect of the wing area to mass ratio on aircraft performance. (GS)