1. TAKS Warm-ups 2 nd 6 weeks physics

2. 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.

3. Which lever requires the least effort to lift the load?

4. Guiding question: What is the meaning of work? What is the meaning of work?

5. State the definition of work to support your answer

6.  Motion is required for work to happen

7. TEKS 4D  Investigate and demonstrate mechanical advantage and efficiency of various machines such as levers, motors, wheels and axles, pulleys, and ramps

8. mechanical advantage  MA = effort distance / resistance distance  MA=length of slope/ height of slope

9. GUIDING QUESTION: How do machines make work easier? What is the ideal mechanical advantage of this inclined plane? a)840 b)48 c)3 d)1/3

10. GUIDING QUESTION: How do machines make work easier? What is the ideal mechanical advantage of this pulley system? a)4 b)1 c)R d)0

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

12. Calculate efficiency  Work output / work input *100

13. GUIDING QUESTION: How do you calculate work, power, mechanical advantage and efficiency?

14. Which of these shows a properly balanced system?

16. TEKS 6A  Describe the Law of Conservation of Energy

19. TEKS 6B  Investigate and demonstrate the movement of heat through solids, liquids, and gases by convection, conduction, and radiation.

23. Guiding question: How does Bernoulli’s Principle explain how an airplane flies? How does Bernoulli’s Principle explain how an airplane flies?

24. 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

25. Guiding question: How would you compare buoyant force and density? How would you compare buoyant force and density?

26. Why does the rock in water weigh less than the rock in air?

27. Guiding question: How is gas affected by pressure, temperature, and volume changes? How is gas affected by pressure, temperature, and volume changes?

29. 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.

31. TEKS 6D  Investigate and compare economic and environmental impacts of using various energy sources such as rechargeable and disposable batteries and solar cells.

34. TEKS 6E  Measure the thermal and electrical conductivity of various materials and explain results.

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