STANDARDS:
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OBJECTIVES:
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Monday, November 10:
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BELLWORK:
-> Please sit and await instructions CLASSWORK: 1. Complete ME Practice assignment individually or in small groups. 2. If you finish early you may work with your group on the project. HOMEWORK: -> Complete development questions, and finish classwork. |
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Tuesday, November 4:
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BELLWORK:
1. Work is done when the a. displacement is not zero. b. displacement is zero. c. force is zero. d. force and displacement are perpendicular. 2. In which of the following scenarios is no net work done? a. A ball accelerates down a hill. b. A ball rolls horizontally at a constant speed. c. A ball falls onto a flat road. d. A ball decelerates as it travels up a hill. 3. Which of the following energy forms is not involved in dribbling a basketball? a. kinetic energy b. gravitational potential energy c. chemical potential energy d. elastic potential energy 4. Gravitational potential energy is always measured in relation to a. kinetic energy. b. total potential energy. c. mechanical energy. d. a zero level. 5. Friction does 400 J of net work on a moving car. How does this affect the kinetic energy of the car? a. The kinetic energy increases by 400 J. b. The kinetic energy decreases by 400 J. c. The kinetic energy decreases by 160 kJ. d. The kinetic energy does not change. CLASSWORK: Watch a video on dropping materials in a vacuum. 1. Review ME Practice assignment. 2. Short distance trials with egg containers 3. Begin egg drop essay HOMEWORK: -> Finish essay -> Watch Work, Energy, Power video or the PE an KE video for additional help -> Complete Notes on Power |
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Wednesday, November 5:
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BELLWORK:
1. A 100 W light bulb a. converts 100 J of kinetic energy to potential energy each second. b. converts 100 J of potential energy to kinetic energy each second. c. converts 100 J of mechanical energy to nonmechanical energy each second. d. converts 100 J of electrical energy to other forms of energy each second. 2. An egg suspended above the ground has 4.0 J of gravitational PE. The egg is then dropped and falls to the ground. What is the KE of the egg just as it reaches the ground? a. 4.0 J b. 0 J c. -4.0 J d. 4.0 J 3. An egg suspended above the ground has 4.0 J of gravitational PE. The egg is then dropped and falls to the ground. What is the KE of the egg just as it reaches the ground? a. 4.0 J b. 0 J c. -4.0 J d. 4.0 J 4. Which of the following refers to the rate at which work is done? a. energy b. kinetic energy c. mechanical energy d. power 5. How much work can a motor with a power output of 50 W do in 1 s? a. 1/50 J b. 1 W c. 50 J d. 50 W CLASSWORK: 1. Watch video on Work, Energy, and Power 2. Complete practice problems relating to project. 3. Write a short response explaining the conversion of PE -> KE and Power in the project HOMEWORK: -> |
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Thursday, November 6:
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BELLWORK:
->During the Powerhouse lab, Jerome runs up the stairs, elevating his 102 kg body a vertical distance of 2.29 meters in a time of 1.32 seconds at a constant speed. a. Determine the work done by Jerome in climbing the stair case. b. Determine the power generated by Jerome. CLASSWORK: 1. Discuss Egg Drop Procedures 2. Complete Egg Drop Lab 3. Review Egg Drop Calculations, Results, and Conclusions HOMEWORK: -> Work on lab report -> |
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Friday, November 7:
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BELLWORK:
A new conveyor system at the local packaging plan will utilize a motor-powered mechanical arm to exert an average force of 890 N to push large crates a distance of 12 meters in 22 seconds. Determine the power output required of such a motor. The Taipei 101 in Taiwan is a 1667-foot tall, 101-story skyscraper. The skyscraper is the home of the world’s fastest elevator. The elevators transport visitors from the ground floor to the Observation Deck on the 89th floor at speeds up to 16.8 m/s. Determine the power delivered by the motor to lift the 10 passengers at this speed. The combined mass of the passengers and cabin is 1250 kg. CLASSWORK: 1. A set of pulleys lifts a piano and does 3,356 joulles of work. If the piano is lifted in 75 seconds, how much power is used? 2. How much work is done in order to cook a bag of popcorn in a 500 watt microwave oven for 5.5 minutes? 3. What is the power of an electric toothbrush if it can do 755.8 joulles of work in 75 seconds? 4. Sara and Josh do the exact same amount of work. Sara does the work in 2.3 hours and Josh does it in 2.5 hours. Who is more powerful? Explain. 5. A dock worker lifts a 375N crate a distance of 0.5m over his head in 2.3 seconds. What is his power output? Hint: You must do a calculation before you can begin to solve for power. 6. An athlete is using the row machine in the gym. She does 3245 joulles of work on the oars in 72 seconds. What is her power output? 7. John is walking to class up the front staircase. He weighs 595N and the stairs are 3.15 meters long. Calculate his power output if he climbs the stairs in 15.2 seconds. HOMEWORK: -> Finish Lab Report |