code: public void applyForce(final float forceX, final float forceY, final float forceZ,
                             final float relX, final float relY, final float relZ) {
          mPhysicsContext.runOnPhysicsThread(new Runnable() {
              @Override
              public void run() {
                  Native3DRigidBody.applyForce(getNative(), forceX, forceY, forceZ,
                          relX, relY, relZ);
              }
          });
      }
docs: Apply a force vector [X, Y, Z] to this {@linkplain GVRRigidBody rigid body}
  on relative position
  
  @param forceX force on the x-axis.
  @param forceY force on the y-axis.
  @param forceZ force on the z-axis.
  @param relX relative position on x-axis to apply the force.
  @param relY relative position on y-axis to apply the force.
  @param relZ relative position on z-axis to apply the force.