Ch6marellal

Chapter 6- Work and Energy!!! = The Physics Classroom: Basic Terminology and Concepts- Lesson 1 =

a) Work -Symbol: W  - Caused when a force is exerted over a distance. Force must have some component along axis of motion -W = F x d x cos θ

b) Gravitational Potential Energy -Symbol: GPE  -Energy due to height  -GPE = mgh

Elastic Potential Energy -Symbol: EPE -Energy due to compression or stretching of a spring -EPE = 1/2kx^2

c) Kinetic Energy -Symbol: KE  -Energy due to motion  -KE = 1/2mv^2

d) Mechanical Energy -  -  -

e) Power -  -  -

= The Physics Classroom: The Work-Energy Theorem- Lesson 2 =

a) Internal vs. External Forces -  -  -

= 2/9 Power Cost Activity = Lindsay Marella

**Objective:** Estimate how much electrical energy you consume on a daily basis (ie: what does it cost my parents)


 * Data Table: **

Total Amount Due: $219.00 kWh Consumed that Month: 911 kWh
 * Household Electricity Bill:**

$0.24 Cost per kWh stated on bill: $0.17 Our actual total cost, $219.00, is including taxes and fee that we might owe for going over a certain limit. So, when divided by the number of kWh we used, it will produce a higher cost than it actually is per kWh.
 * Cost per kWh:**

I cost $0.37 per day and $10.73 per month, using just those ten appliances.

Whenever I see that something costs less than a dollar, I automatically assume it’s cheap. So, when I calculated that my electric bill charges us $0.24 per kWh used, I thought woah that's so cheap!!! Also, I had some weird idea that every bill cost thousands of dollars, so when I saw that ours was just over $200 I thought we were very good at conserving energy and had a great electric plan. However after I realized that our low cost per kWh was normal, I realized that maybe we could do a better job of turning the lights off when we leave a room and not use as much heat and wear warmer clothes instead. I excluded my refrigerator from this list and that runs 24/7 so I'm sure that uses a lot of energy that was missed in my calculations.
 * Analysis:**