Rigid is immovable, unbending. Semi-rigid can move in a limited way.
no they are not rigid.
Yes, it is non-rigid.
She was the first major Russian female mathematician. She discovered the Kovalevsky top which is a type of rigid body motion. She was a math professor as well as a writer of non-mathematical books.
a non rigid is a square and a hexagon
Movement of a shape can involve flexing - for example, a square frame being flexed into a rhombus. Rigid motion excludes such motion: the shape of the moving object does not change.
dilation (APEX)
Stretch
The key difference between a particle and a rigid body is that a particle can undergo only translational motion whereas a rigid body can undergo both translational and rotational motion
Rigid motion
A rigid link is: a joint between Structural members which does not permit relative motion between them.
Planets
( t = I a ) Rotational motion and centripetal acceleration. This is defined by its equations of motion.
Edward Washington Suppiger has written: 'An analysis of the motion of a rigid body' -- subject(s): Dynamics, Rigid, Rigid Dynamics
The asthenosphere
the asthenosphere
Ajoy Batra has written: 'Initial spatial motion of a rigid body on removal of one constraint' -- subject(s): Computer simulation, Motion, Dynamics