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Either these structures or tie rods are used to support the loads lifted by wall-mounted jib cranes. For 10 points each:
[10m] Name these beams that have a fixed support at one end and are free at the other end.
ANSWER: cantilever beams [reject “lever”]
[10e] The length of the cantilever on a jib crane determines this quantity for the crane. This quantity is the amount of force amplification provided by a simple machine.
ANSWER: mechanical advantage [or MA; accept actual mechanical advantage or ideal mechanical advantage or AMA or IMA]
[10h] These drives are used to control crane motors because their ability to smoothly ramp up and down prevents the load from swinging or slipping. A rectifier, DC bus, and inverter are the three components of these drives, which control motor speed by modulating the power supply.
ANSWER: variable-frequency drives [or VFDs; accept AC drives or variable-speed drives or AC variable-speed drives or AC variable-frequency drives or VFD inverters or variable-voltage variable-frequency drives or VVVF drives]
<Other Science>
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Conversion

TeamOpponentPart 1Part 2Part 3TotalParts
Arizona StateYale1010020ME
Chicago AIllinois A100010M
Chicago BHarvard100010M
Cornell BNorth Carolina B0000
Georgia StateFlorida0000
Georgia TechIowa State010010E
IndianaNorthwestern1010020ME
Johns HopkinsCornell A1010020ME
MarylandOhio State100010M
MichiganRIT1010020ME
MinnesotaToronto C100010M
NYUWUSTL B010010E
North Carolina ARutgers1010020ME
OttawaUC Berkeley B1010020ME
Penn StateLSE1010020ME
StanfordWaterloo A010010E
TexasToronto B1010020ME
Toronto AWUSTL A1010020ME
UC Berkeley AColumbia A010010E
UCFIllinois B010010E
VanderbiltVirginia0000
Virginia TechMIT1010020ME
Waterloo BBritish Columbia1010020ME
Winona StateColumbia B0000

Summary

TournamentExact Match?HeardPPBEasy %Medium %Hard %
2025 ACF NationalsYes2412.9267%63%0%