Breakable Parts - Lift and Fall

Although you may use any dummy from the L1 Force category of the Physics Toolbox to pick and control other physics rigid bodies, the connection is not unbreakable. After you designate the connection to be breakable, the structure will scatter as soon as it encounters external forces.

Adding a Lift & Fall Dummy

1. Apply an Infinite Plane from the Physics Props library as the surface for the segway to move along.
2. Apply the Lift & Fall dummy from the Prop > Physics > Physics Toolbox > L1 Force library.
   
3. Play to simulate the lift and fall animation.

Connecting Breakable Rigid Bodies to the Dummy

1. Apply a box and transform it close to the dummy.
   
2. Designate the box as a Dynamic rigid body in the Object Physics Settings panel (Shortcut: Shift + F9).
3. Apply a Hinge constraint to the box via the Constraint Settings panel (Shortcut: Shift + F10).
4. Pick the dummy as the target and set other settings according to the illustration below:

   Connect the box to the Lift & Fall dummy. Set the Local X to Lock to keep the box fixed and to prevent the box from rotating when the dummy moves up and down.

5. Most important of all, enable the Collision Constrained Object and the Breakable boxes, then set the Max Force to 1. Setting this to a low value will cause the connection between the dummy and the box to be broken with even a minimal external force.
   

   Note

   Please note that in addition to falling from a high position, the constrained rigid body with Breakable activated can be affected by other strong collisions such as sudden movements by itself, or collisions from other fast moving rigid bodies.

6. Click the play button on the control to simulate again. The box will first go up with the dummy and then break free and bounce away as soon as the dummy falls down to the ground again.
   

   Note:

   If the connection does not break on your first attempt, you may: Increase the Mass and Elasticity values of the box so that it bounce enough to break the connection. In this case, 3 and 100. Alternatively, you can increase the Height Limit in the Advanced Panel of the Physics Control of the dummy.

Duplicating the Breakable Physics Objects

1. Go to the first frame. Duplicate the box to several boxes and position them around the dummy. The physics and constraint settings of the new boxes will be totally identical to the original one.
   
2. You may optionally differentiate the Mass and Elasticity values of the boxes to have them bounce differently.
3. Click the Up button in the Physics Control to lift up the entire set and then drop it onto the ground.