Unit4H - Energy/Work
Wednesday 4/21/21
discussed how a stretched rubber band and a stretched spring have more stored energy than an unstretched rubber band / spring
students conducted the Pivot Interactives Lab: Spring Force Scaffolded
watched a video of me doing an experiment and then discussed similarities of experiments
the experiment produced Hooke's Law: F=kx where F=force; k=spring constant;, and x=stretch
discussed units and meaning of slope (or spring constant, k)... N/m
began discussing meaning of the area under the F vs. x graph
Thursday 4/22/21
reviewed concepts from PI Spring Force lab:
F=kx+Fmin
F=kx for ideal springs (which is what we will assume)
Eel=(1/2)Fx=(1/2)kx^2 ... finished this today
Energy unit is Nm or J (Joule)
discussed energy with Feynman audio lecture found here
introduced remaining calculable energy locations:
Ek=(1/2)mv^2
Eg=mgh
students copied and worked 7 example problems involving the three equations for energy stored in different places
Introduced the concept of energy storage location with this document
introduced pie chartsdiscussed the solutions to front side ofUnit 4H Practice 1
Friday 4/23/21
introduced pie charts
discussed the solutions to front side of Unit 4H Practice 1
discussed a physical example with numbers (1/2 kg mass is at 2m...determine Eg...)
discussed two involved problems requiring pie charting
introduced bar chart representations
students explored Phet simulation Energy Skate Park ...weekend homework will be to complete Google Doc w.r.t. this simulation
students spent remaining in-class time working on the back of Unit 4H Practice 1
Monday 4/26/21
discussed solutions to back of Unit 4H Practice 1
handed out Unit 4H Practice 2
handed out Unit 4H Practice 3
handed out Unit 4H Practice 4 and set up problems using pie charts...students must complete
students explored Phet simulation Energy Skate Park ...in-class work will be to complete Google Doc w.r.t. this simulation
Tuesday 4/27/21
students wrapped up circled questions on Unit 4H Practice 2
helped students get started on Unit 4H Practice 3
handed out Unit 4H Practice 4 and set up problems using pie charts...students completed today
students got started on HPs 6 2021
discussed Atwood's Machines with forces and now with conservation of energy
discussed projectiles by analyzing forces/motions in x and y directions...and now with energy
investigated the energy analysis of a pendulum
Wednesday 4/28/21
discussed solutions to Unit 4H Practice 2
discussed solutions to Unit 4H Practice 3
discussed solutions to Unit 4H Practice 4
students got started on HPs 6 2021
Thursday 4/29/21
livestream
introduced the concept of work
discussed several situations in which the work-energy theorem is implemented
students got started on HPs 6 2021
Friday 4/30/21
Unit 4 quiz
discussed several more situations in which the work-energy theorem is implemented
introduced power = time rate of change of work
class did power lab (stairs)
time left over was spent on HP6s 2021
Monday 5/3/21
go over Unit 4 quiz
reviewed concepts for tomorrow's Unit 4 Exam
watch this video developing the concept of conservation of momentum
watch this video for homework showing how to use the mass-velocity block (momentum charts) to solve problems
work Unit 5H Momentum/Impulse Practice 1 . Upload a scan/pic of your work to Google Classroom. If you have questions about how to do the assignment after watching the video, ask them in the Google Classroom thread.
Tuesday 5/4/21
students are took Unit 4 Examg
watch this video developing the concept of conservation of momentum
watch this video for homework showing how to use the mass-velocity block (momentum charts) to solve problems
work Unit 5H Momentum/Impulse Practice 1 . Upload a scan/pic of your work to Google Classroom. If you have questions about how to do the assignment after watching the video, ask them in the Google Classroom thread.
Today's Recording