The document discusses the six types of simple machines: levers, screws, wedges, ramps, wheels and axles, and pulleys. It explains how fulcrums are used in levers and describes mechanical advantage and efficiency. Compound machines, gears, and work are also defined. Hydraulics and pneumatics are mentioned as using pressure from liquids and gases, respectively, to lift objects.
2. Know examples of the 6 different types;
◦ Levers – Class 1, 2, 3
◦ Screw
◦ Wedge
◦ Ramp
◦ Wheel and Axel
◦ Pulley
3. Fulcrum in the middle, effort and load on the
ends
4. Fulcrum on the end, load in the middle and
effort on the other end
5. Fulcrum on the end, effort in the middle and
load on the other end
6.
7.
8.
9.
10.
11. Where more than one simple machine works
together in order to perform a task
12. Have inter-connecting teeth that merge with
other gears in order to turn
Two or more gears working together creates
a mechanical advantage through a gear ratio
13.
14. An assembly of moving parts used to manage
motion
15. Is the force that opposes motion
Every device cannot have 100% efficiency
because they will always have friction to deal
with
Friction requires energy to over come it
16. MA is calculated by dividing the output force
by the input force
MA = Output force
Input force
17. Is calculated by dividing your input distance
by your output distance
SA = Input distance
Output distance
18. Always written as a percentage
A machine with 20% efficiency means 80% of
its energy is lost to heat
Efficiency is solved by dividing MA by SA and
then multiplying by 100
Eff = MA x 100
SA
19. W = Force x Distance
Work only occurs when the object moves
20. Hydraulics – use liquids in order to create
pressure to lift objects
Pneumatics – Use gas as a means to create
pressure to lift objects
