See Also: UIPushBehavior Members
The UIPushBehavior.SetTargetOffset method can be used so that the force vector is applied to a location other than the IUIDynamicItem.Center location.
The unit used for force is the "UIKit Newton" which is defined as accelerating a (100,100)-sized view to 100 points / second^2. If the UIPushBehavior.Mode is UIPushBehaviorMode.Instantaneous, the velocity of the UIKit.IUIDynamicItem changes immediately.
After an instaneous push is applied, the UI Dynamics engine sets the value of UIPushBehavior.Active to false.