Provides an analysis of the forces causing the erratic motion of a knuckleball. Reveals the manner the ball should be thrown to provide maximum deflection. (Author/CP)

An analysis of the minimum stopping distance problem is presented taking into account the effect of weight transfer on nonskidding vehicles and front- or rear-wheels-skidding vehicles. Expressions for the minimum stopping distances are given in terms of vehicle geometry and the coefficients of friction. (Author/BB)

Discusses the criteria and procedure for optimizing the performance of Archibald rubber-band heat engines by using the appropriate choice of dimensions, minimizing frictional torque, maximizing torque and balancing the rubber band system. (GA)

Demonstrates that investigating coriolis effects in a fixed frame leads to a clearer understanding of the physical nature of the phenomenon. (SL)

Examines the motion of a particle in a noncentral potential using the action-angle formalism. (SL)

The lack of parallelism between the force and acceleration vectors has several apparently paradoxical consequences that have been recently examined. This article uses a different and more general mode of analysis than previous authors to derive quite general, rather than particular, results. (Author/SK)

Examines several parameters concerning the performance of tennis rackets, such as the location of the center of percussion, the time of contact, the period of oscillation of the tennis racket, and the coefficient of restitution of a tennis ball. The purpose is to design a racket with improved playing characteristics. (Author/GA)

Distinguishes between the work done by the source and the work received by the system. Shows that a comparison of the magnitudes of quasistatic and nonstatic work can be carried out only through the use of the laws of thermodynamics. (GA)

Derives an equation relating the internal pressure of a rubber balloon to its radius. Shows that the theoretical pressure curve is experimentally verifiable, and discusses the problem of equilibrium configuration of two interconnected ballons. (Author/GA)

Compares several derivations of the Clausius-Mossotti relation to analyze consistently the nature of approximations used and their range of applicability. Also presents a statistical-mechanical calculation of the local field for classical system of harmonic oscillators interacting via the Coulomb potential. (Author/SK)

Shows that the elementary ballistic range problem solution, when scaled by the reciprocal of the eccentricity, contains in itself a good description of the more general Keplerian ballistic problem. (Author/GA)

Describes and explains some aspects of the motion of a top, the extreme end of which is made round, spinning on surfaces provided with friction. (Author/GA)

This article shows that the centrifugal force in a rotating reference frame possesses the property that the brachistochrone and tautochrone are identical. In this system the force is repulsive and proportional to the distance from the force center. (Author/BB)

Constructs a theory, using Aristotelian lines of thought, to explain Galileo's assumed experimental results that all bodies fall at the same rate, ragardless of their weight. (GA)