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Hardly appropriate to use a general dictionary to define a scientific term. In actuality, a "simple" machine such as a wheel and axle should be able to be drawn in the most primitive form, thus not necessitating the "groove" nor the "chain" in the dictionary definition.

Instead, this definition is more accurate: "The wheel and axle is generally considered to be a wheel attached to an axle so that these two parts rotate together in which a force is transferred from one to the other." (Wikipedia)

A screwdriver is, at its basic function, a wheel and axle, because the diameter of the handle is greater than the diameter of the shaft, leading to the increase in outputted energy in comparison with the inputted energy in order to turn a screw. However, it MAY be used as a wedge, and it MAY be used as a lever. In the scenario, the screw is wedged into the cap of a paint can, and an effort is on the handle end to provide a force for the resistance on the other end, with the fulcrum being the edge of the paint can, thus creating a first class lever.

In the original question, the screwdriver is identified as a "flat-head" screwdriver, in which case I would assume it to be also a wedge because a cross-head could not logically be a wedge, and that detail makes it a wedge. The other simple machine is an obvious wheel and axle.

FINALLY (in support of all of my points):
Actually, the links only serve to identify the screwdriver as a variety of different simple machines. When its a flathead one though, it makes things slightly different. In the end, I don't think there will be a question this simple on the test but if there is, then a situation will most likely be pictured, such as a screwdriver tip under a paint can cap to act as a lever or rotating a screwdriver to act as a wheel and axle.

Using Merriam-Webster's definition of a wheel and axle it can't be a wheel and axle but instead a lever but using Wikipedia it is a wheel and axle those are the 2 answers I was looking for so the best was chinesesushi because it can be used multiple ways. I personal believe it is a lever over a wheel and axle mainly because a wheel and axle is in the lever family and is basically just a lever.

helicpters_rule wrote:Using Merriam-Webster's definition of a wheel and axle it can't be a wheel and axle but instead a lever but using Wikipedia it is a wheel and axle those are the 2 answers I was looking for so the best was chinesesushi because it can be used multiple ways. I personal believe it is a lever over a wheel and axle mainly because a wheel and axle is in the lever family and is basically just a lever.

But then that's like saying there's really only two simple machines. Although partially true, it is clearly not the appropriate answer in this event.

But As you said "a "simple" machine such as a wheel and axle should be able to be drawn in the most primitive form" and a wheel and axle in its most primitive form, looking at how forces are applied and the movement it causes it is a lever, making a lever it just as good an answer as wheel and axle because they are the same thing if you don't accept Merriam-Webster's definition of a wheel and axle.

helicpters_rule wrote:But As you said "a "simple" machine such as a wheel and axle should be able to be drawn in the most primitive form" and a wheel and axle in its most primitive form, looking at how forces are applied and the movement it causes it is a lever, making a lever it just as good an answer as wheel and axle because they are the same thing if you don't accept Merriam-Webster's definition of a wheel and axle.

Lever and Wheel Axle i think are pretty distinctly different though. I think it's a wheel axle because there is a transfer in force, the handle has a larger diameter then the shank or tip. And they're connected, like a wheel and axle, so I don't really see how it wouldn't be? U

I'm saying it can be considered both a lever AND a wheel and axle.

Someone should start up a question again

1. What is the relationship between power and efficiency? Describe.
2. What are characteristics of a gun tackle? What are characteristics of a block and tackle?

1. As power increases, efficiency decreases. As I increase the power, energy is utilized less efficiently.

2. Two pulleys, one fixed, and one not fixed, with a mech advantage of 2 (the rope is attached to the fixed pulley, and loops around the movable). Block and Tackle is any system of two or more pulleys assembled into blocks, and then blocks pairing up together (one fixed, one movable).

nicely explained

ur turn