Gravity is a global load that, when enabled, affects all bodies and Point Masses in the model. The material density must be nonzero for gravity to affect a body.
The default gravity direction is set in the Preferences. A yellow arrow displays at the center of the global coordinate system to indicate when gravity is enabled. Gravity is expressed in units of length per (unit time)2.
The values of standard gravitational acceleration in two popular unit systems are as follows: