The virtual world of
NEWTON v3.0 provides
a completely new way of learning physics ?the exploration of
kinematics and dynamics on a computer in 3D.
The virtual world of Newton is ruled by the
simulated laws of physics, allowing you to build, manipulate
and investigate your experiments interactively, without the
limitations of physical models.
When creating an experiment in Newton, you
can select from a wide range of real world or abstract
objects, from the simplest geometrical bodies (brick, sphere,
etc.), complex instruments (stands, slope, car, etc.), and
constraints (many types of joints and springs). 
You can adjust their physical parameters (mass, elasticity,
friction, etc.); assign to them forces, torques or velocity;
and make relationships subject to constraints. You can add
virtually any object to Newton using a VRML editor; you may
also export your experiments in VRML format
With the example files included, it's easy to get started.
You can alter them and simulate again, and you will
see that it's quite simple to create amazing demonstrations.
When running a simulation, the bodies start moving, guided by
the acting constraints; are rotated by torques; and collide
with each other as in a movie.
Actually, you can set up one or more cameras and
capture their views of the experiment, storing them in an AVI
file. You can also add descriptions to your examples, with
explanatory texts, images, and formulas. 
Using diagrams, it뭩 easy to measure and
evaluate the results of your experiments. Several user-defined
curves can be displayed on the same diagram, so it's easy to
compare the measured data with the results derived from
theoretical calculations. You may also change the units of the
physical quantities.
