- Homework Statement
- The 6-kg lid on the box is held in equilibrium by
the torsional spring at theta = 60°. If the lid is forced closed,
theta = 0°, and then released, determine its angular velocity at
the instant it opens to theta = 45°.
- Relevant Equations
- ONLY PRINCIPLE OF WORK AND ENERGY USED!
hello guys, I wanted to ask whether I can just consider/think about this as being rotation around a fixed axis in a plane representing it as if it was 'just' a rod. This is mainly so that for the kinetic energy in the second position is where if we think about it in just a plane. Is this correct? And then for the moment of inertia I'll take into account that it is a squared surface.
Thanks in advance!
EDIT: can I get some help please on how to determine the angles that need to be used for the work done by the torsional spring, I don't know which to use in the equation of the work integral of between which angles?