Shows how the use of pulleys can add a new direction to experiments that demonstrate forces. Procedures used and typical student results are included. (JN)

Explains a projectile motion experiment involving a bow and arrow. Procedures to measure "muzzle" velocity, bow elastic potential energy, range, flight time, wind resistance, and masses are considered. (DH)

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)

Describes the discovery and characteristics of superconductors. Discusses some experiments on the levitation of a magnet over a superconductor. (YP)

Outlines a simple method which shows the relation between work done in accelerating a mass and the resulting velocity of the mass. Equipment used includes a rubber ball, ramp of lumber, graph-chart, stopwatch, and hand calculator. (DH)

Describes an inexpensive tensiometer, a balance consisting of a plastic drinking straw as the crossarm, a needle as a pivot, and wire loop counter balance to assure proper balance. The instrument permits the quantitative demonstration of interfacial tension and effects of various agents that modify it. (Author/JN)

Describes three demonstrations/activities that involve forces: (1) a canoe-like boat made from copper window screen; (2) magnetic forces with a paper clip and ceramic magnetic; and (3) an "icemobile" machine that cuts ice cubes without an obvious source of energy. (DH)

Describes: the chemical history of a pencil; a simple solar camera for measuring the sun's diameter; the experimental comparison of the thermal stability of metal carbonates; and the introduction of the concept of weight as a force to young children. A computer program listing on color mixing is also provided. (JN)

Discusses the problem of ellipticity in the motion of the ordinary Foucault pendulum and the error caused by it. Presents a simple method of slightly modifying the force-displacement relation in such a way that precession does not result from ellipticity. (Author/SK)

Explains: (1) use of piezoelectric film (connected to power supply and oscilloscope) to reveal force-versus-time curves of bouncing balls; (2) use of bound wood splints or meter sticks to illustrate tree or tower stability; and (3) apparatus of co-axial discs with connected linking rods and suspended bobs to simulate waves. (DH)

Describes an experimental sequence using the force probe to develop the relationship between net force and acceleration. (PR)

The Zimbabwe Secondary School Science Project (ZIM-SCI) developed student study guides, corresponding teaching guides, and science kits for a low-cost science course which could be taught during the third year of secondary school without the aid of qualified teachers and conventional laboratories. This ZIM-SCI study guide is a five-part unit…

The Zimbabwe Secondary School Science Project (ZIM-SCI) developed student study guides, corresponding teaching guides, and science kits for a low-cost science course which could be taught during the first 2 years of secondary school without the aid of qualified teachers and conventional laboratories. This ZIM-SCI study guide presents activities…