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## Tuesday, March 23 rd Agenda

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**Tuesday, March 23rdAgenda**• Finish lab calculations • Chapter 8 Jeopardy Review • Homework: • Finish Chapter 8 Study Guide • Chapter 8 crossword Puzzle • Chapter 8 Test/Study Guide Due • Thursday, March 24th!**Lab Calculations**• To convert grams to kilograms: • Divide your number of grams by 1,000 • To convert centimeters to meters: • a. Divide your number of centimeters by 100**Lab Calculations**• 3. To find the average time ball traveled (s): • Time ball traveled for trial #1 • Time ball traveled for trial #2 • + Time ball traveled for trial #3 • Answer • b. Divide Answer by 3 to get average time (s)**Lab Calculations**• 4. To calculate the average speed of the ball (m/s): • Average speed = length of ramp (m) average time ball traveled (s) • To calculate final speed (m/s): a. Multiply average speed by 2 to get final speed**Lab Calculations**• To calculate final kinetic energy (J): • a. Use the equation for kinetic energy • KE = ½ X (mass of ball) X (final speed)2 • To calculate initial potential energy (J): • a. Use the equation for potential energy • PE = (mass of ball) X (9.8 m/s2) X (ht of ramp)**Defending Your Conclusions**• Use COMPLETE SENTENCES to answer the “Defending Your Conclusions” section of the lab. • Be sure to answer ALL PARTS of the questions, not just a Yes or No…**Jeopardy Teams1B**• Team #1: • Team #2: • Team #3: • Team #4: • Team #5:**Chapter 8**Work & Energy**THE RULES:**• There will be 5 teams • The host’s decisions are final • Each member of the winning team will receive $1 mole money**And now…here is the host of Jeopardy…**Mrs. Elfline**Let’s Get Ready to play…**Today’s Categories are:**Definitions**Simple Machines Critical Thinking Calculations Word Puzzles $100 $100 $100 $100 $100 FJ $200 $200 $200 $200 $200 $300 $300 $300 $300 $300 $400 $400 $400 $400 $400 $500 $500 $500 $500 $500**Work**100**Time**200**The ability to do work defines**Answer…**Energy**300**The sum of the kinetic and potential energy of large-scale**objects in a system is called Answer…**The ratio of useful work output to work input is a measure**of Answer…**Efficiency**500**Levers are divided into how many classes based on the**location of the fulcrum? Answer…**3**200**What is the mechanical advantage of a single, fixed pulley?**Answer…**1**400**3rd class**500**A boy pushes on a parked car with a force of 200 N but the**car does not move. How much work does the boy do on the car? Answer…**A quantity that measures how much a machine multiplies force**or distance is called Answer…**Energy**300**Gravitational potential energy depends on the:a. Mass of**the objectb. Height of the objectc. Acceleration due to gravityd. All of the above Answer…**Nuclear Fusion**500**A boy uses a force of 65 N when he lifts a box 1.2 meters.**How much work does he do? Answer…**78 J**100