what does the brakeman, on a 4-mn bobsled do?
98621
Braking is the least of his responsibilities. The brakeman is the key to the success of the bobsled drive in both the two-man or four-man competition.\n\nBrakemen have many of the qualities that NFL scouts crave. They are big, strong, fast and – most importantly – explosive. Brakemen can make or break a bobsled team. Like football, where the quarterback gets all of the glory, such is life in bobsled. The driver gets most of the credit, but it's the brakeman who does the heavy lifting.
85395
The bobsled race was introduced in the 1924 Olympics in Chamonix. The first gold medal in the 4-man bobsled went to Switzerland.
890881
once you are in a 180 you turn your front wheel and do a whip with your back end and let your body go with it
505272
Who needs brakes...? live a little...have some fun.
437995
you're supposed to wrap the string around the axle tight enough so that when the trap sets off it will pull the string, causing the axle to rotate, which in turn will spin the wheel\n\nthe key to winning: USE GEARS OR PULLEYS.
279419
Pop that bering out < use the allen wrench that comes with the blades > and insert the new bering.\n\nI've never done that; just saw my friend do it ... usually, I go through 4 brakes, and new wheels ... then I buy a new pair of blades ... it's not like their expensive ... in fact it's more economical to ditch the old and get new ones <cost of 8 wheels <$30>: 16 Bearings <$40>: and 4 breaks <$12> = $82 vs new blades from $60 to $120>.  Unless you're training for competition, just get the affordable stuff.
799705
OK, below is a list of websites that may give you ideas.  Try a couple of ideas and test them at home before taking them into class?\n\nUsing the clothespin as the main source of energy does not necessarily mean that the spring has to be the main driver of the machine?  It might be used more as a trigger release – thus allowing the clothespin to be the main release of the energy.\n\nGood Luck.
893409
I ride flatland and own a flatland bike shop. Here's some info.\n\nFlatland is a BMX riding style that is performed on smooth flat surfaces, often with flatland specific frames, front & rear bolt on axle pegs, a hollow stem bolt for the front brake cable, and rear brake detangler or "gyro" to facilitate the bars being able to rotate endlessy without tangling the brake cables. Also invented specifically for flatland bmx riding was the rear hub mechanism called a "freecoaster", that allows the rear wheel to roll backwards without engaging the hub to make the pedals rotate around. Other technical bicycle setup specifics can include narrow handlebars, rear hand brakes and a Gyro rear brake cable detangler device, very high pressure tires, and a very small front sprocket. But in concept, any BMX bike with axle pegs could be used for flatland riding.\n\nIn a contest, your talent and skill is judged by your ability to maintain coordination and balance while performing a variety of difficult and elegant moves. There are usually several categories for judging purposes which can include:\n\nnumber of touches, i.e. = the number of times a rider does not complete their trick and/or touches their foot to the ground \nnumber of tricks completed in the alloted time \ndifficulty of the tricks; which can be very subjective, as flatland bmx has become as (if not, more) technical in many ways as figure skating and breakdancing \noriginality of the tricks performed; which again is fairly subjective \nstyle and flow; which means how smooth and/or stylish did the rider perform their moves during the contest run. \nFlatland is an involving, time-consuming discipline where the rider learns different balance, counter-balance points and center-of-gravity in motion through repetition and trial-and-error. Some tricks can be learned in hours, others may take years to achieve.\n\nSome flatland riders would refer to flatland as a type of art, and would place the emphasis on being original, while others consider having the most or hardest tricks the important thing, and still others ride just for fun. There is no right or wrong, and only contest riders need to be concerned with the competitive side of things, as there are many riders who prefer doing shows, having parts in videos, or simply riding with their friends and enjoying themselves as much as winning a contest.\n\nRiders usually pedal a few times for speed, and perform various stunts often involving difficult and/or awkward stances on pegs, mounted to the axle of their front or back wheels. Pegs are hollow metal tubes, which are bolted onto both sides of the front and back axles. When flatland riding first came into being, most riders would do one trick, and then get back to the pedals and that was it, but by combining different body, and bicycle positions, into "combos" and "linking" them together, riders challenge themselves further by doing several tricks in a row without stopping inbetween each move. Flatland riding is usually a combination of many different kinds of moves, often linked together in a non-stop fashion as the rider goes through as few as 2 or 3, or as many as 10-12 moves, and position or direction changes in a row, and then finally returning their feet to the pedals. It has been somewhat unelegantly compared to both ice skating, and breakdancing, and really, it is its own thing, but those comparisons will give you a vague idea of what to expect to see.\n\nNotable flatland BMX legends include Bob Haro,Kevin Jones, Chase Gouin, Ross Smith, Bill Neumann, Pete Brandt, Jesse Puente, Chad Degroot, Andrew Faris and Trevor Meyer. Modern flatland legends that have influenced other riders include Simon O'Brien, Martti Kuoppa, Mat Wilhelm, Phil Dolan, Lee Musselwhite, Jeff Desroche, Cory Fester, Percy Marshall, Stephan Cerra, Terry Adams, and Tanaka Kotaro.\n\nStall moves were among the first flatland tricks invented, they require good control o
730530
Kinetic Energy, KE=1/2mv^2, where m is the mass of the person+sled equal to 77.2kg. This you got right. v is their initial velocity of 3.1m/s which you got right, too. Now substitute known values:\n\nKE=1/2*77.2*3.1^2\n     =370.9Joules\n\nThey came to rest because of the work done by the force of friction. The formula for work  is F*s, where F is the force we are interested in and s is the displacement given as equal to 30m.\n\nTherefore, Work =F*30\n\nBased on the principle of conservation of energy, kinetic energy=work.\n\n370.9=30F\nF=370.9/30\n  =12.4N\n\nCoefficient of friction=F/R where R is the total weight normal to snow which you must already have computed correctly as well.\n \nCoefficient of friction=12.4/(77.2*9.8)\n                                 =0.016\n\nLet's skin the cat another way using the formula,\n\nv^2-u^2=2as, where v is the final velocity of 0, u is the initital velocity which you correctly got , equal to 3.1m/s,  s the displacement of 30m, and a the acceleration. Now substitute known values:\n\n0-3.1^2=2*a*30\n-9.61=60a\na=-9.61/60\n  =-0.16m/s^2  it's negative because the person and sled were decelerating.\n\nNow solve for the force of friction using the formula, F=Ma.\n\nF=77.2*0.16\n  =12.4N  Same as above so coefficient will also be the same, i.e. .016, viz:\n\nCoefficient of kinetic friction=12.4/756.6\n                                            =0.016\n\n\nI also cannot figure out what I did wrong either, if you say the above solutions and answer are incorrect.
129066
No, Lasalus Brown won a bobsled silver as the brakeman for Canada 1 on Sunday.
1035029
None, just go slower and stop for 5 second breather now and then. Trust me, he'll be pissed but "IT" wont come out as fast.
155762
The angle and speed. Have you watched coll runnings? You should its a g8 bobsleighing movie!
519407
they're called Rollie Reds or something...basically its magnets...there's mini brakes on the wheels so instead of rolling it just stops!
198359
I like to practice the Sierra Slamma.\n\nIt's a very difficult trick to pull off, but it goes a little something like this.\n\nI'll drive down the street in my GMC Sierra truck and a skateboard will slide out in the roadway in front of me. No time to break and perfect timeing is required. The trick is complete when you hear the snap, crackle, and pop of the skateboard as the truck tires roll right over the top of it. \n\nFun times!
253666
Its on the lift cylinder. Some are just a rubber plug.
1053772
Does it feel good on your foot.  It should give you room to expand since your feet will grow slightly.  Make sure ther is room in the toe area too.  \n\nYou definatley want the brake in the back.  When I was learning how to ride a bike I enjoyed it so much I didn't remember how to use the brakes so I went straight into a light pole.  \n\nThe brakes on blades can be a little tough at first.  You will have to use balance.  \n\nRoller Blading is great and a good exercise too.  Don't do any fancy tricks at first.\n\nNow about buying them...\n\nGo to a sporting store like Dicks Sporting Goods or something of the like.  Shop around there and a few others.  If you see a pair you like then that's the way to go.  The can range from $40-$150.  So it is all a matter of what looks and feels good.  Try going to the roller rink and get a leg in(pun).  The rentals are crap but you will get a feel for size.\n\nGood luck.
1048350
There may be too much brake fluid in the rear brake reservoir tank.\n\nbut cannot be too sure unless yo specify the make and model of brake unit.  Shimano offers details for servicing disk brake systems.