lesson 1,2
Each Machine is designed to meet a _____
Basic need
What is a simple machine?
A tool or device made up of one basic machine that have little or no movement
What is the name for the gear in front of a gear chain?
Sprocket
What is the dif. Between kinetic and potential?
Potential is energy stored, and kinetic is energy at work.
If I'm pulling a rock by 1 newton, and it weighs 4 newtons, what is the MA?
4N
What is something ALL machines need?
power/energy
What are the 6 simple machines
Lever
Wheel and Axle
Pulley
Wedge
Inclined Plane
Screw
What is a hydraulic system?
A system with liquid in a enclosed space, under pressure to move loads
what is the difference between Non-renewable and renewable energy
Non-renewable (not easily replenished)
Renewable (easily replenished)
Calculate the mechanical advantage when it takes 250N to move a 500N object
How were machines powered in the past?
animals and humans
What is a subsystem?
A part of the whole machine that includes certain parts working together to do a certain job
What’s it called when multiple gears are connected?
Gear Train
Define Linkage
Direct connection using belt or chains to transfer energy
John’s machine moves 1.5m when the input force moves 6m
4m
What is a persian wheel?
A mechanical water lifting device operated usually by animals
What’s complex
machine?
A device made of several simple machines put together
How do you solve for pressure?
Area divided by force
Define Energy and a few examples
The ability to do work
Ex. potential and stored energy
The mechanical Advantage of a pulley is 25 and the speed ratio is 2.5. What is the efficiency of the pulley?
10%
What are 3 basic parts an aqueduct needs?
Pump
Channels
Distribution System
What are the 3 classes of a lever?
First class
Second class
Third class
What’s a pneumatic system?
A system that uses gases instead of liquid under pressure
The 5 main renewable energy sources?
Solar, geothermal, wind, biomass, and hydropower
If the efficiency is 56%, and we know that the MA is 32N. What is the SR?
0.0175m