Free Body Diagrams -
Newton's First Law or Law of Inertia
"A Body in motion will stay in motion and a body at rest will stay at rest unless acted upon by an outside force."
SAS Newton’s 2nd Law
Ft=mv
F=ma
a=F/m
m=F/a
https://youtu.be/8HQEs6lkDmM TED - 2nd law problems
https://youtu.be/PYUnoYDbWVU TED - free body with friction
https://youtu.be/2QiL1bCLmbc TED the elevator problems.
https://youtu.be/uSfAut5GMq4 TED on friction
https://youtu.be/Fws5Ld9p0t8 TEd on co-efficient of friction
SAS Newton’s 3rd Law
"For every action there is an equal but opposite reaction."
The Humpty Dumpty Clan Air Cannon Survival Challenge.
Into every generation of Pullus Ovum, from the clan of Humpty Dumpty comes a challenge. We have some brave volunteers to acta as crash test dummies. Will these "volunteers" join their long scrambled spiritual ancestor, or will they survive for their proper fate of being hard boiled? At which point we can see how scrambled their insides were after they are shelled.
You are to build an Egg Survival Vehicle or ESV.
The mass of the ESV is to not exceed 250 grams, excluding "air bottle" and the egg.
The length with the plastic water/soda bottle is not to exceed 1.0 meters.
Egg Survival Rating (ESR) is :300 = no apparent damage, 200 = small crack or stress marks, 100= crack liquid visible but not dripping or leaking out.
Egg Survival Score (ESS) = ESR / (length * mass)
No parachutes, chemically powered rockets, offensive markings or materials that would be considered socially inappropriate, offensive or violate school rules. Design and materials listing is to be approved by the teacher (ME) before construction of the device. I am very liberal on what I allow to be used, however....
The egg cannot be altered in any way, and will be placed in the Egg Body Bag, or EBB before the launch and removed from the EBB if it survives for a post crash inspection and possible boiling as time allows, to see what the effect of that many g's of acceleration did to the inside. What does a concussion look like?
The leading edge of the ESV will be placed 1.0 meters from the block wall, and about 620 kPa (90 psi) of air will be the pressure in the "air bottle" before launch. Expect the device will have an initial launch velocity of about 100 km/hr. Yes, all those calculations you used before will have to be used on your report.
You are expected to film your launch to gather data of how many "frames" (1/28th of a second) did it take to stop and calculate in your report the Impulse, momentum, forces, and acceleration your ESV had to deal with, and why your egg survived or failed to survive.
The anticipated launch dates are November 8th and 9th, 2016.
Now for a little lab on force and acceleration.
newtons_2nd_law_worksheet2.xlsx | |
File Size: | 36 kb |
File Type: | xlsx |