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1.

## Bows, Arrows, and Aircraft Carriers [electronic resource]: Moving Bodies With Constant Mass

In this program, geometry is combined with approximation to solve relatively complex problems involving shooting an arrow and landing an airplane on the deck of an aircraft carrier. Emphasizing the value of sketching as a visualization tool, the program also explains how the solution of the archery problem, through geometric inversion, can help solve the problem of a plane landing.
Online
2006; 1999
2.

## Impulse [electronic resource]: Moving Bodies With Variable Mass

Using Newton's second law and a balloon-powered toy car, this program examines how impulse relates to the change in momentum and how the rate of that change equates to the resultant force. In addition, the exhaust velocity of the jet-propelled car is estimated.
Online
2006; 1999
3.

## Modeling Vectors [electronic resource]

Employing diverse examples such as trains and water slides, this program illustrates the use of vectors to represent forces operating in both two and three dimensions. The algebraic manipulation of vectors in modeling problems is featured.
Online
2006; 1999
4.

## Kites [electronic resource]: Modeling With Vectors

After defining the basic concepts of vectors, this program uses algebra to determine how the resultant of numerous forces acting on a body can be obtained and then equated to the product of mass and acceleration. Kites are employed to exemplify both equilibrium and non-equilibrium conditions.
Online
2006; 1999
5.

## Doors, Heart Valves, and Flic-Flacs [electronic resource]: Moments

After explaining the principle of moments, this program shows how apparently dissimilar physical phenomena are actually mathematically similar through the examples of a synthetic heart valve, a lock gate, and the gymnastic maneuver known as a flic-flac, or back handspring. The need to make careful approximations during the modeling process is stressed.
Online
2006; 1999
6.

## Bikes and Cars [electronic resource]: Centripetal Acceleration

This program considers the idea that circular motion must imply a force or component of a force toward the center of a circle, as in the Newtonian theory of how the Moon orbits the Earth. The reasons why bicyclists lean during turns, why roads are banked, and why car tires react as they do during a turn are investigated.
Online
2006; 1999
7.

## Damping [electronic resource]: Simple Harmonic Motion

This program investigates how the mathematical model of simple harmonic motion becomes more complex through the introduction of damping. The application of simple modeling techniques to create homogeneous linear second-order differential equations is illustrated.
Online
2006; 1999
8.

## Parachuting [electronic resource]: Moving Bodies With Constant Mass

This program uses a parachutist to demonstrate the effects of drag on the force of gravity, showing how to make mathematical approximations and how the resultant forces can be equated to the product of mass and acceleration. A first-order differential equation is then used to find the minimum height from which a parachutist can jump without injury.
Online
2006; 1999
9.

## Pendulum [electronic resource]: Simple Harmonic Motion

This program introduces the concept of simple harmonic motion through the operation of the pendulum. The findings of Galileo and his contemporaries on the mechanics of the pendulum are presented, along with examples of pendular motion drawn from the modern world.
Online
2006; 1999
10.

## Resonance [electronic resource]: Simple Harmonic Motion

In this program, resonance is examined. The value of mathematical models is demonstrated through the physics of applying a time-varying force to a body that fundamentally exhibits simple harmonic motion. Solution techniques for general linear second-order differential equations are featured.
Online
2006; 1999
11.

## Rockets and Avalanches [electronic resource]: Moving Bodies With Variable Mass

In this program, footage of rockets blasting off and avalanches roaring down mountainsides provides two perspectives of the same principle: the rate of change of momentum. Practical calculations of the time it takes for a rocket to lift off and the time a skier has to escape a landslide, plus an experiment with eggs and flour, reinforce the lesson.
Online
2006; 1999
12.

## Sliding and Toppling [electronic resource]: Modeling Forces

This program discusses how geometry, gravity, and the coefficient of friction determine whether an object slides or topples. The mathematical models behind these phenomena are presented through examples such as ice hockey and skiing. The relationship between sliding and a body's velocity as an exercise in energy conservation is explored as well.
Online
2006; 1999
13.

## Spinning Tops and Ailerons [electronic resource]: Moments and Angular Momentum

In this program, animated graphics help to define the concept of angular momentum and to express the relationship between moments and the rate of change of angular momentum. Problems include determining the dimensions needed for an airplane's ailerons and the amount of force required to rotate a toy spaceship. The reasons why a spinning top shows precession are also addressed.
Online
2006; 1999
14.

## Take-Off [electronic resource]: Moving Bodies With Constant Mass

This program shows that a single mathematical model can describe the takeoff of a wide variety of aircraft, running the gamut from a single-engine trainer to the Concorde. Because the search for approximations is somewhat complex, graphical notation is employed to reveal the interaction and variation of the forces involved.
Online
2006; 1999
15.

## Vectors and Moments [electronic resource]

Moving beyond the concept of simple force, this program expands the application of vectors to include velocity, acceleration, and rotational motion. In addition, moments of greater complexity are investigated through vector geometry. Real-world examples are included.
Online
2006; 1999