my parents came to CT this past weekend. They both tried rock climbing, and I’m proud to say that they did quite well. Both my mother and father seemed to feel comfortable on the walls and completed a few exciting climbs.
Talk about cool parents.
There were some other people at the gym who couldn’t help but comment on how they wish that their parents would come climbing with them. So, once again, my parents have proved their coolness. 4 stars mom and dad! 4 stars!
Firstly, the comments on that last post were priceless. thanks to everyone.
Alicia’s calculations were good, but they don’t take into consideration the distance he falls. Aaron is right, it has a lot to do with Kinetic energy. and until he started talking carbonated beverages, he was right on. Let’s take the climbers mass as 91 kg (200.2 lbs). we will use the height of 7 meters (21 feet). And Alicia’s calculation of velocity at impact of 11.7 m/s.
at impact: K.E. = 1/2 m v^2 = about 6230 Joules
But force of impact is also dependent on stopping power. The whole advantage of my stopping Joel is that I’d have about about 1.5 meters (5 feet) of slow down time. If Joel hit the floor, he would be stopped almost immediately and would suffer a lot more.
A Joule is defined as the amount of work done when an applied force of 1 newton moves through a distance of 1 meter. So, since I would be providing 1.5 meters of slow down, I can divide our 6230 by 1.5 to get the amount of force (in Newtons) needed to stop Joel.
6230/1.5 = 4153 N
Converting Newtons to Pound Force
4153/4.448 = 933.67 lb
So, I would feel about 933 pounds slamming down on me…. But this is only from 7 meters. The wall is 13 meters high. From 13 meters, I would get hit with about 7700 N, or 1731 lbs. For the average person, that would definitely result in serious injury. Thankfully, I’m a muscle monster and could certainly catch even the heaviest climber without a problem. 1731 pounds? walk in the park.
Jesse and I were discussing what would happen if somehow, mid-rock climb, the rope snapped. While this would never happen to a mindful rock climber (because wear on rope is very obvious), we were trying to figure out how quickly the belayer would be able to react and whether or not they could catch or slow the descent of the falling climber.
I commented on how I thought there would certainly be a chance of death for the person trying to save his falling comrade.
mike d: “Especially if I tried to save someone like Joel. I think if he landed on top of me, his weight could easily crush my chest.”
jesse: “I don’t know, I think the chance of survival for the climber would drop significantly, with very little chance of the belayer dying.”
mike d: “it would be easy enough to figure out.”
jesse: “true. we know the mass, the acceleration, and the height… though I don’t know the strength of bone.”
mike d: “well, if it came out to be some ridiculous amount of force…”
AND THEN! SIMULTANEOUSLY…
mike d: “like 12,000 pounds of force.” Jesse: “like 6 tons of force.”
6 TONS = 12,000 Lbs
Weird that we would both choose the same arbitrary “ridiculous amount of force.”
I’ve come up with two possible explanations.
1. Jesse and I have a strange roommate bond that results in us thinking alike… though in different units.
2. a ridiculous amount of force is just about equal to 6 tons.
MIKE D! it’s Sander!
hey Sander… what’s up?
DUDE, I’m here with JACLYN. she wants to mother your CHILD
SERIOUSLY. SHE WANTS TO HAVE SEX WITH YOU, LIKE, EVERY MINUTE.
of course she does.
I mean: EVERY MINUTE
i’m sure. I think I’m going to go back to bed now
Were you SLEEPING!?!?
Alright MIKE D. You Should go back to BED! Maybe in the morning you’ll forgive this DRUNKEN phone call. WOOO!
LATER MIKE D!
I was doing a little Google sightseeing, and I found my least favorite part of route 2.
In Lexington, there’s a section where the road suddenly drops from 4 lanes to 2 lanes. It’s obnoxious. And, there are no signs hinting of the traffic doom ahead.
Granted, there is that exit there. But I still think it should be a more gradual process.