#

Name

Allowed Values

Comments

1.

Ball
Size

S

Small

M

Medium

L

Large

Note that, in the
underlying physical model behind the size we have the mass which is, in this
case, proportional to ball’s squared radius (2D).

2.

Random
number of balls

ON

Random number of balls will
be used every time the application is launched

OFF

Use the underlying slider
to select desired number of balls.

Note that, maximum number
of ball varies depending on the selected Ball Size.

3.

Gravitation

ON

iPad’s embedded
accelerometer provides information about acceleration in three independent directions
X/Y/Z.

OFF

Accelerometer is ignored.

4.

Elastic
collisions

ON

Balls are bouncing
elastically without losing their kinetic energy.

OFF

Balls are not bouncing elastically.
Each time the collision encounters there occurs also a loss of kinetic energy. The
kinetic energy is not conserved.

Use underlying slider to
select desired Coefficient of Restitution (bounciness)

5.

Draw
Vectors

ON

Vectors are drawn:
Velocity: Red, Momentum: Green, Acceleration: Blue

Note that, Velocity and
Momentum are sharing the same direction and sense.

OFF

No vectors are drawn.
