Answer:
No, they need to be somewhat flexible so that forces such as turbulance don't shear the wing off.
Explanation:
Instantaneous center:
It is the center about a body moves in planer motion.The velocity of Instantaneous center is zero and Instantaneous center can be lie out side or inside the body.About this center every particle of a body rotates.
From the diagram
Where these two lines will cut then it will the I-Center.Point A and B is moving perpendicular to the point I.
If we take three link link1,link2 and link3 then I center of these three link will be in one straight line It means that they will be co-linear.

Answer:
Option C (practice by..............technical) would be the appropriate choice.
Explanation:
- A prerogative seems to be the discipline or nature of the design process to ensure.
- All certificates must, therefore, throughout compliance with current requirements including professional competence, express one's right and privilege of providing offers perhaps throughout the areas of qualified professionals.
Some other alternatives that are given aren't connected to a particular scenario. But that's the best solution above.