Event Rules
What can a team bring for the written test portion?
A binder full or notes and resources
What is a simple machine?
A mechanical device that changes the direction or magnitude of a force
The main concept is physics
In a real-world machine, the Actual Mechanical Advantage can never be greater than the Ideal Mechanical Advantage?
True
You must use metric units
What class calculator can you bring to the event?
What is efficiency?
The ratio of work output to work input
What type of simple machine is the machine you are building?
It is a simple lever machine
A screw is technically a variation of which other simple machine wrapped around a cylinder?
Inclined Plane
What kind of supplies can you bring?
Anything non-electric
What is prohibited in the event? (Name one)
Springs, electric components, and electronic components are prohibited
The product of a force and the distance over where it was applied
What is the difference between AMA and IMA?
IMA is theoretical calculation (distance ratio) and AMA is the real-world measuremeant where friction and inefficiency (force ratio)
If you increase the length of a wedge but keep its thickness constant, what happens to its Ideal Mechanical Advantage?
Increases
How many minutes of test time is there?
4 minutes
What is the minimum amount of questions that are going to be on the written test?
There is going to be at least 25 questions
What is effort force?
The force applied to the machine
What is Newton's first law?
An object at rest stays at rest
True or False:
A single fixed pulley changes the magnitude of the input force required to lift a load (assume ideal conditions)
False
Which class of lever is represented by a human forearm lifting a weight (bicep provides effort, elbow is fulcrum, hand holds load)?
3rd Class Lever
What is the ratio limits from the heaviest test mass to the lightest test mass in States?
The ratio limit is 5.5
The force exerted by the machine on the object being moved
How do you calculate the ratio of the weights?
You have to find the distance between the first weight and the fulcrum and the second weight and the fulcrum. Then, divide the distances.
Which quantity is always conserved in an ideal simple machine, but not in a real machine?
Work
How much time can you take to setup at Regionals?
5 minutes