About the Gravity Dialog Box
Use the Gravity dialog box to define a gravitational acceleration vector for your model. The dialog box contains the following information:
• Magnitude—Enter a positive value for the magnitude of the acceleration for your gravitational force in distance/second². The distance measurement depends on the units you have chosen for your assembly.
The default value for Magnitude is the gravitational constant expressed in the default units set for the assembly (for example, 386 in/second²).
• Direction—Enter X, Y, and Z coordinates to define the vector of the gravitational acceleration and force. The direction is defined with respect to the default coordinate system of the top-level assembly in your mechanism.
The default direction for the gravitational acceleration is the negative Y direction of the World Coordinate System (WCS), as shown by the directional vector.