Free Fall 3D

Free Fall 3D simulates the same physics as the Free Fall model but with a 3D View of the model's data.  The ball falls with constant acceleration g=-9.8 m/s² in the z direction.  Click-dragging on the ball changes its height but leaves its velocity unchanged.  The reset button stops the animation and sets the initial conditions to y=1.8 and v_y=0.  See the Free Fall model for a description of this model is implemented in Ejs.

The model's 3D view has many built in features that can be accessed as the program is running.

• Left-button click-dragging on the particle changes its position.

• Left-button click-dragging on an empty regions rotates the view.

• Left-button shift-click-dragging zooms in and out.

• Left-button control-click-dragging translates (pans) the view.

• Left-button alt-click-dragging displays a 3D cursor on the scene (if the panel is “Enabled”).

It the ‘x’, ‘y’ or ‘z’ key is pressed during a mouse action, the actions affects only this coordinate.  Note also that these actions are are modified if the 3D view is projected onto a 2D plane.

Right-clicking within a 3D view displays a popup menu.