Simple Machine Knowledge #1
Simple Machine Knowledge #2
Simple Machine Knowledge #3
Work & Power
Mechanical Advantage & Efficiency
100
Stairs, Ladders and Ramps are all examples of this simple machine
What is an Inclined Plane?
100
What are the three types of levers?
What are class 1, 2 and 3?
100
These are wheels with teeth, which mesh together to transfer force.
What is gears?
100
This is the amount of work you can do over a certain period of time (=Work/Time)
What is Power?
100
Simple machines may allow for greater force, but over a smaller _____________.
What is distance?
200
This simple machine has a fulcrum.
What is a lever?
200
This is the difference between a wheel and axle and a pulley.
What is a groove in the middle for a rope/chain/belt?
200
Your teeth are examples of this simple machine.
What is a wedge?
200
This what you make when you use a force to move an object some distance (=Force x Distance)
What is Work?
200
What causes most machines to be inefficient?
What is friction between surfaces (creates heat).
300
This tool makes work easier and has few or no moving parts.
What is a simple machine?
300
A wheelbarrow is an example of this class of lever.
What is second class?
300
Your arm is an example of this simple machine.
What is a lever (3rd Class)?
300
This is the unit for Work.
What is Joule(s)?
300
If you put 10N of effort into a machine, and its output is 100N, what is its mechanical advantage?
What is 10 (MA=10)?
400
Some wedges resemble two of these placed back-to-back.
What is an inclined plane?
400
What pulley system requires the least amount of work: one single pulley, two fixed pulleys, or one fixed and one movable pulley?
What is the system with one fixed and one movable pulley?
400
This is what we call two or more simple machines combined together.
What is a complex machine?
400
This is the unit for Power.
What is a Watt?
400
If I pedal an old rusty bicycle with 200N of force, but it only puts out 50N of force, what is its efficiency?
What is 25% (MA=output/input)?
500
What is a great simple machine to use when you want to hold two objects together?
What is a screw?
500
A screwdriver is an example of this simple machine.
What is a wheel and axle?
500
A pair of scissors is made up of these two simple machines.
What is a lever and wedges?
500
If you move a 10 N object 20 m in 60 s, how many watts have you used?
What is 3 Watts? (W=10Nx20m, 200J/60s=3w)
500
It is never possible to have a machine with this level of efficiency.
What is 100%?
M
e
n
u