identify which core technology is represented by the examples below: december 6, 2009 drill u3d-l4...
TRANSCRIPT
Identify which Core technology is represented by the examples below:
December 6, 2009
DRILL
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a. Door latch e. Crankshaft
b. Thermostat f. Cylinder
c. Fan g. Battery
d. Light bulb h. Gas tank
a. Mechanical
b. Electronic
c. Mechanical/Thermal
d. Optical
e. Mechanical
f. Structural
g. Electrical
h. Structural
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2. 3. 4.
5. 6.
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2.
input input
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inputinput
3.
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4.
input input
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5.
input input
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input
6.
input
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• Machines are artifacts that transmit or change the application of power, force, or motion.
• What is an artifact?– something created by humans usually for a practical
purpose.
• Machines can be simple or complex– Complex machines are comprised of…. Simple Machines
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• Simple machines work on 2 basic principles:
LEVER
INCLINED PLANE
Principle: a law of nature underlying the working of an artificial device
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• 3 Categories of simple machines based on the principle of the LEVER:
LEVER
Lever Wheel and Axle
Pulley
• Lever Arm • Fulcrum• Applied Force• Load• 3 different Classes of levers:
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LEVER
Which is 1st class?
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• 1st class:– The fulcrum is between the load and the effort force
LEVER
Which is 2nd class?
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• 2nd class:– The load is between the effort and the fulcrum
LEVER
Which is 3rd class?
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• 3rd class:– The effort is placed between the load and the fulcrum
LEVER
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• Notice the direction of motion of the Force and Load for each of the 3 classes of lever.
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• Identify and sketch 3 common mechanical devices (not discussed in class during this lesson) that exhibit characteristics of the 3 classes of lever.
• For example: