Cap Wrench
Cap Wrench
 |
No items matching your keywords were found.
How do you open a glass bottle with a metal cap?
How's this for irony? My friends (two AP Physics students) and me (an engineering student) took about an hour to finally open a glass bottle of soda with a metal. We tried heating the cap with hot water to loosen it, twisting it with a wrench, banging the cap with the wrench, and then finally using a pair of pliers to yank it open. So how the hell are you suppose to properly open this damn thing anyways? For god sake, have the people making this bottles ever heard of plastics? What is this, the freaking Dark Ages??!!!
ah the perils of education. lol. i assume you mean the good ol' traditional metal cap and not the twist off. friend, that's what they make bic lighters for. so dear mr engineer, remember the story about levers. http://www.cool-science-projects.com/images/man-and-lever.jpg grip bottle just below the cap. With a first-class lever, when the fulcrum is closer to the resistance, the output force is increased. However, there is a corresponding decrease in both output speed and distance. Conversely, when the fulcrum is closer to the effort, the output force is decreased and there is a corresponding increase in both output speed and distance. lay your bic on top of your thumb. (college students note: that's the blunt end toward the bottle). slide the [lever] under the cap; your thumb, the fulcrum. press the end down, cap pops up. this does not damage the cap as commercial openers do. (in the unlikely case you wish to recap the bottle). some may wish to create a "hinged" fulcrum with thumb and index of other hand -- in which case you will need to slide gripping hand down appropriatly.
A machine is a device that helps make work easier to perform. (Remember, Work = Force X Distance). A machine makes work easier to perform by accomplishing one or more of the following functions:
transferring a force from one place to another,
changing the direction of a force,
increasing the magnitude of a force, or
increasing the distance or speed of a force.
When a machine takes a small input force and increases the magnitude of the output force, a mechanical advantage has been produced. If a machine increases an input force of 10 pounds to an output force of 100 pounds, the machine has a mechanical advantage (MA) of 10. This is shown below:
MA = Output Force = 100 lbs. = 10
Input Force 10 lbs.
F1 X D1 = F2 X D2
where, F1 = Input Force F2 = Output Force
D1 = Input Distance D2 = Output Distance
The mechanical advantage of a lever is the ratio of the length of the lever on the applied force side of the fulcrum to the length of the lever on the resistance force side of the fulcrum. The mechanical advantage of the lever below is 10:1. Therefore, an applied force of 10 pounds will balance a resistance force of 100 pounds. However, the applied force end of the lever must move 10 feet for every one foot the resistance force s raised.