A procedural task was demonstrated via videotape in two formats - one with motion, one using a series of still photographs. The sound tracks were identical. In two experiments the motion treatment was superior for some subjects and cuing arrows made no difference. (Author)

Describes several demonstrations designed to dispel student misconceptions relating to falling bodies. An object moving with a horizontal velocity is shown to fall to the earth as quickly as a free falling object dropped from the same height. (JR)

Describes two experiments using carbon dioxide cartridges to demonstrate Newton's third law of motion. (JR)

Explains vast applications of simple harmonic motion in many fields of physics. With examples of 16 phenomena governed by the law, the author points out in conclusion that phenomena which may look like simple harmonic motion may not be in reality. (PS)

Students' cars and wristwatches are used as "apparatus" to introduce and demonstrate Newton's second law of motion. Forces acting on cars are discussed and typical student data (for different makes of cars) are provided. Data could also be used in discussions of work, horsepower, efficiency, and energy cost. (JN)

Provides an explanation for the observed motion of frisbees, can lids, "clay pidgeons," and flat stones when these objects are thrown through the air. Explanation focuses on forces (gravity and air), torque, and gyroscopic precession. (JN)