TAKS

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TAKS

• Warm-ups
• 2nd 6 weeks physics

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TEKS 4C

• Analyze the effects caused by changing force or
  distance in simple machines as demonstrated in
  household devices, the human body, and satellite
  orbits.

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1
Which lever requires the least effort to lift the
load?
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Guiding question

• What is the meaning of work?

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2
State the definition of work to support your
answer
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• Motion is required for work to happen

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TEKS 4D

• Investigate and demonstrate mechanical advantage
  and efficiency of various machines such as
  levers, motors, wheels and axles, pulleys, and
  ramps

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mechanical advantage

• MA effort distance / resistance distance
• MAlength of slope/ height of slope

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3
GUIDING QUESTION How do machines make work
easier?

• What is the ideal mechanical advantage of this
  inclined plane?
• 840
• 48
• 3
• 1/3

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GUIDING QUESTION How do machines make work
easier?

• What is the ideal mechanical advantage of this
  pulley system?
• 4
• 1
• R
• 0

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What is the mechanical advantage of this pulley
system? a)1 b)5 c)2 d)4
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Calculate efficiency

• Work output / work input 100

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GUIDING QUESTION How do you calculate work,
power, mechanical advantage and efficiency?
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Which of these shows a properly balanced system?
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Which of these shows a properly balanced system?
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TEKS 6A

• Describe the Law of Conservation of Energy

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TEKS 6B

• Investigate and demonstrate the movement of heat
  through solids, liquids, and gases by convection,
  conduction, and radiation.

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Guiding question

• How does Bernoullis Principle explain how
  an airplane flies?

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According to Bernoulli, the faster a fluid flows
the less pressure it exerts. In the diagram
above, where is the air flow the slowest?
A) On the top B) on the bottom C) top
and bottom are the same
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Guiding question

• How would you compare buoyant force and
  density?

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15
Why does the rock in water weigh less than the
rock in air?
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Guiding question

• How is gas affected by pressure,
  temperature, and volume changes?

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TEKS 6C

• Analyze the efficiency of energy conversions that
  are responsible for the production of electricity
  such as from radiant, nuclear and geothermal
  sources, fossil fuels such as coal, gas, oil, and
  the movement of water or wind.

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TEKS 6D

• Investigate and compare economic and
  environmental impacts of using various energy
  sources such as rechargeable and disposable
  batteries and solar cells.

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TEKS 6E

• Measure the thermal and electrical conductivity
  of various materials and explain results.

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• In addition, there will be one question on
  density and two on action reaction pairs as
  review on this 6 weeks DCA

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