Dan Fullerton Physics Videos:
Work
Power
Springs and Hooke's Law
Types of Energy
Conservation of Energy
Crash Course Physics #9 work, energy & power
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Today is a work day to catch up on webassign, or review for the quiz on Friday. Here are some resources to help you review:
Dan Fullerton Physics Videos: Work Power Springs and Hooke's Law Types of Energy Conservation of Energy Crash Course Physics #9 work, energy & power
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Yesterday we talked about conservation of mechanical energy and began solving problems. Today we talked about power, and work done by variable forces. Tomorrow will be a work day to work on webassign problems. Thursday we will work on challenging problems together, and Friday will be quiz on all work/energy concepts.
Today we tried to talk about the spring lab, but not enough people actually completed their graphs to have a productive class discussion. Bummer. Make sure you catch up on the webassigns. There is a homework check on Monday!
Today we gathered data to quantify the relationship between the force on a spring and its stretch (displacement). You should have gathered data for a single spring, and data for either 2 springs in parallel (side by side) or 2 springs in series (one after another). You should have 2 graphs, each with a best fit line (use a ruler), slope calculation, and equation for the line. This is due tomorrow.
Today we talked about conservative forces and potential energy. We looked the formula for gravitational potential energy, and elastic potential energy. There is a new webassign for potential energy.
Today was a work day to finish the work-energy theorem webassign problems. Your lab is also due on Friday.
Today we derived the work-kinetic energy theorem, and then used it to solve problems. The solutions to the class examples are available in the google drive folder for chapter 6. You should begin working on the webassign problems!
Today we began talking about work and kinetic energy. We realized that when the net force on an object is zero (constant velocity), the net work done on the object is zero. When an object is accelerating the net work is not zero. We will finish up talking about this topic on Monday. Work on the first webassign.
For you lab, if you are confused about the analysis, we will talk more about it on Monday. The lab will be due on Tuesday due to the number of questions I've received about the analysis section. Today we began chapter 6 with a discussion of Work. You should be able to predict whether a particular force is doing work based upon the direction of force and the displacement of the object, and calculate the amount of work a force is doing on an object. THere is a new webassign to help you practice these concepts.
The solutions to the take home quiz are available here:
page 1 page 2 page 3 page 4 page 5 The free response portion of your final exam will be Tuesday 1/17. You will have 4 free response questions - one of them will be a lab based questions (you will be analyzing data and/or writing a lab procedure), one will be a paragraph length response, and two will be problem solving with multiple parts/steps. |
Reminders:
Chapter 2 test retake is Wednesday 10/17. You can take the retest either before school or after school, but you must complete all of the Chapter 2 homework (75% completion on each assignment) to be eligible for a retake!
Resources:
If you want to review topics, you can find excellent videos here.
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