1.
What properties of the flywheel device do you think would impact its ability to store energy?
Section 14.1 Rotational Kinetic Energy
Exercises Warm-up Activity - Flywheel
Suppose you wanted to design a device that stores energy in the form of rotational kinetic energy (such a device is known as a flywheel).
2.
What practical considerations would you want to account for in designing a flywheel?
Rigid objects with both translational and rotational motion also have both translational and rotational kinetic energy. As with other forms of energy you have studied, any other form of energy can be transformed into rotational kinetic energy---and the reverse is true as well!
Definition 14.1.1. Rotational Kinetic Energy.
The rotational kinetic energy of a rigid object with angular speed \(\omega\) and moment of inertia \(I\) is given by:
\begin{equation*}
K_{rot} = \frac{1}{2}I\omega^2
\end{equation*}
Exercises Activities
1.
Visit
this link and watch the video. Be sure to make and record your prediction and follow the internal video links (you will end up watching a total of three videos).
2.
Write a brief (1-2 sentence) summary of how your thinking changed as you watched the videos.
References References
[1]
Spool Trick by Veritasium.
