ICA will be open today for the 10:00 am only! Please remove your name from the sign up if you are not going to attend. A snow emergency is still in effect for Phoenixville which comes with a hefty fine if you get stuck. Be careful out there.
“Fight Gone Worse”
Complete 3 rounds of 1 minute of work at each station:
- DB thrusters (50/30#)
- Power snatch (95/65#)
- Box jumps (20/16″)
- Push presses (95/65#)
- Row (1 cal = 1 rep)
Rest 1 minute after each 5 minute round.
Weather Notes: Stay tuned tomorrow morning to see if classes are still on. The gym can physically be opened but we don’t want to endanger ICAers or hinder the progress of the street crews by opening irresponsibly. We’ll see conditions around 7:00 tomorrow and make a decision.
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If class is on, I hope Murray doesn’t show up. I really don’t want to do his birthday burpees.
Sounds like a good at-home snow wod to me!
Well Kehl, you won’t have to worry about burpees because his real birthday was on Thursday!! Thank god!!
And my neighborhood still hasn’t been plowed. I am not dedicated enough to snow shoe to ica.
Hey All,
I just took a drive to check roads. They’re not good. Parts of 23 have 6 to 8” of snow still. If you don’t have 4 wheel drive, I would not recommend coming in. Also remember that weight of vehicle and number of wheels with power do not effect the coefficient of friction (going can be easy, stopping is still hard). Physics!
What about centripetal force around windy roads, Mr. Mu?
And then there were 6 who didn’t heed John’s warning and showed up. 🙂
Don’t you think an example would have been appropriate to accompany the physics lesson?
Example – Car, Braking and Required Distance to Stop
A car with mass 2000 kg drives with speed 100 km/h on a wet road with friction coefficient 0.2.
Note! – The friction work required to stop the car is equal to the kinetic energy of the car.
The kinetic energy of the car is
Ekinetic = 1/2 m v2 (3)
where
m = mass (kg)
v = velocity (m/s)
Ekinetic = 1/2 (2000 kg) ((100 km/h) (1000 m/km) / (3600 s/h))2
= 771605 J
The friction work (energy) to stop the car can be expressed as
Wfriction = Ff d (4)
where
Ff = friction force (N)
d = braking (stopping) distance (m)
Since the kinetic energy of the car is converted to friction energy (work) – we have the expression
Ekinetic = Wfriction (5)
and (4) and (3) can be combined and modified to calculate the stopping distance of the car
d = Wfriction / μ m g
= (771605 J) / (0.2 (2000 kg) (9.81 m/s2))
= 197 m
How is Physics effecting the 9:30 tomorrow?
No effect. You walk 🙂
Ahhhh…true….but, if 9:30 isn’t offered in mind/body …does it actually exist??
Ha, that’s just a mistake! Thanks for pointing it out. There is a 9:30 tomorrow! Will fix MIndbody momentarily
Thanks for asking, Kerri!!! I was wondering about the 9:30 as well 🙂