Complete the account of standing up.
An object is stable while the vertical through its centre of ______ falls inside its base of ______. An internal support carrying soft material is an ______. In ceramics it must be removed before firing because clay ______ and the support does not.
Word bank: mass · support · armature · shrinks · gravity · expands
Hints
- The first two blanks state the stability condition.
- The last blank is the reason a ceramic armature cannot stay in.
Show the answer
An object is stable while the vertical through its centre of mass falls inside its base of support. An internal support carrying soft material is an armature. In ceramics it must be removed before firing because clay shrinks and the support does not.
The last blank ties this lesson to the second one in the unit. Shrinkage is not merely a sizing inconvenience, it is the reason an entire category of support technique had to be invented for ceramic work.
Practise Structure, Armature and the Centre of Mass
The app has 4 more questions on this lesson, and keeps your place in the course. Sculpture I is free to start.
More questions on Structure, Armature and the Centre of Mass
- Why does lowering the centre of mass make a sculpture more stable, given the same base?
- Which are true of the condition for an object to stand?
- An armature must be removed before a model is moulded and cast, exactly as it must before firing.
- A sculpture leans until the vertical through its centre of mass reaches the edge of its base. What happens…
- Sort each design move by what it does to stability.
- Arrange these decisions in the order they should be taken.
- Arrange these approaches to a ceramic armature from the least to the most intervention required after…
- An armature prevents soft clay from slumping during modelling, but clay shrinks as it dries. What follows…