1. Unit 07 “Work, Power, Energy and Energy Conservation”

2. Purpose: The purpose of this activity is to investigate work, power and energy through inquiry. Directions: 1.Record your mass in the data table below. 2.Time how long it takes you to run or walk up the stairs in the hallway, record this time below. 3.Record the vertical distance you covered during this time. 4.Calculate your Force, Work, Power and Energy for this exercise.

3. Class Data: StudentMass (kg) Time (s) Force Applied (N) Distance Covered (m) Work Done (Joules) Power (Watts) Energy Used (Joules) Ms Bucci 707.50 686 3.9m (1 flight) 2675 3572675 Ms Sully 707.50 686 7.8m (2 flights) 5351713 5351 Me Walking Me Running

4. Force Force Work Done Power (walking) Power (walking) Power (running)Power (running Calculations: Part I Ms Bucci Me

5. Calculations: Part II Calculate how many 60 Watt light bulbs Ms Bucci could light by running up the steps. Calculate how many 60Watt light bulbs you could light by running up the steps. How can you change how much work you can do? What doesn’t change the amount of work you can do?

6. Calculations: Part III StudentEnergy Used (calories) 4.184 Joules = 1 calorie Candy BarEnergy in Candy Bar calories Number of Flights to burn off Energy Ms Bucci Me How do you know how much energy your legs have used to bring you up the steps? What type of energy does the candy bar have? What type of energy is the energy from the candy bar converted to when moving up the steps?