Assertion: clock's pendulum | /r/Desires | less power
Facets:
Source sentences:
text: In addition to increased accuracy, the anchor's narrow pendulum swing allowed the clock's case to accommodate longer, slower pendulums, which needed less power and caused less wear on the movement.
text: Because longer and slower pendulums need less power to run and so cause less wear to the rest of the clock movement, grandfather clocks are mechanically preferable to mantel clocks, even if less convenient.