Can Openers

Most were very primitive with hard edges and corners, but later in the decades they became more rounded

Yes, manual and electric can openers have a magnet. It is to hold onto the lid so it does not drop into the can. However, the magnet is not "in" the opener. It is on the outside, above where the piece punctures the can, but below the lever arm and wheel that makes the sharp wheel go around the can.

A "regular" can opener is a machine that combines a wedge (to cut through the top of the can) with a wheel and axle (which moves the can opener's cuttng wheel -- the wedge -- around the top of the can). The input force is provided by the operator, either by hand or via electric power. The output force is the separation of the metal of the top and the movement of the opener around the can. We also find that the can and the openers parts get a bit warmer with its use, and there are losses in the system due to friction.

Gears and wedges Sixth grader Actually their are 3 simple machines in a can opener. 1.A wedge 2.Wheel and Axle 3.A second class lever 8th grader

Yeah; you turn a bigger wheel to drive a small one, so when you turn the big wheel you use your force over a longer distance, which causes the small wheel to have more power over a smaller distance

Daka Research Inc. manufactures the One Touch can opener and several one touch items. These items were mainly invented for the families of seniors so that they could have an better quality of life and the company now has a full line of item for the kitchen.

There are three classes of levers and each represents a positional configuration of the fulcrum, the load and the force on the lever: Class 1: The fulcrum is located between the applied force and the load Class 2: The load is situated between the fulcrum and the force Class 3: The force is applied between the fulcrum and the load No its a second class lever because the fulcrum is located at one end and the force is applied to the lever arm at the other end. The "load" in this case is the can.

They smacked them against their heads until they opened.

There is no one simple machine that is a can opener. A can opener is a combination of simple machines: 1. Wedge, 2. Lever, 3. Wheel and axle.

Please see http://www.answers.com/Q/What_is_a_can_opener

A can opener opens "tin cans" (though they do not contain much tin now in the manufacturing process). A metal can opener first punctures the lid of the can, then is manually clamped down onto the lip of the can. The lip is the raised edge around the lid. The manual opener then works from a human turning a wheel on the opener. This action begins to "cut" the metal on the inside of the lip / outsider edge of the lid. The opener contains a magnet that attaches to the lid, so when it is completely cut, the lid can be lifted off. The edges of the lid may be ragged; it can cut skin. The lid is thrown away; the food is removed and the can is thrown away. An electric can opener operates on the same principles: using a lever, clamp, magnet, wheel, and a turning action. The main difference is less work for a human. Some men or military personnel use a knife with a second edge on it. This uses manual force to puncture the lid and to go around the lid. The edge is very jagged. A knife carries more risks.

A Pelican

They are familiar with the noise and have realized that they get food right after they hear the noise. So they respond.

Think about it. You must clamp the can opener onto the can (lever). After squeezing the can opener onto the can using LEVERAGE, two small metal discs WEDGE themselves into the can. Then finally by manually turning the can opener, you are utilizing a GEAR, WHEEL and AXLE system to open the can. Hope that helps.

What kind of question is this? No one.

He invented it in precisely 1952. So they say.

Some do, some don

A lever style can opener

Yes it is

Can openers are from steel.

The can opener came first

How would you open cans without one

It's a first class lever.

It is often called "A Church Key".

The can opener is a sharp wedge. It has a sharp point or blade that is forced into and through the metal of the top of a can. In the manual kind, a lever (handle) is attached, and we can move the lever to pierce the can. We then push the lever back, move the wedge, and apply pressure again. In electric or mechanical can openers, we start with lever action to pierce the can. Then a moving drive forces the opener along the edge of the can and the wheel cuts the metal. A motor applies torque to the drive, or we apply torque with the hand to turn the drive and force the cutter along the rim of the can. The cutter is a moving wedge forced through the metal to split it apart.