ragnelle 's List: ME3101 Part2

• he input force (that of the carpenter's hand pulling back on the hammer handle) multiplied by the input lever arm is always equal to the output force (that of the nail-puller pulling up the nail) multiplied by the output lever arm. The relationship between input and output force and lever arm then makes it possible to determine a formula for the lever's mechanical advantage.
• Class III levers operate in exactly the opposite fashion.
• Class II levers maximize force at the expense of range of motion
• On a theoretical level, at least, it is possible to calculate the mechanical advantage of a compound pulley with more wheels: the number is equal to the segments of rope between the lower pulleys and the upper, or support pulley.
• For any plane in which the slope is more than 45°, however, the mechanical advantage will be less than 1
• The mechanical advantage of an inclined plane is equal to the ratio between the distance over which input force is applied and the distance of output; or, more simply, the ratio of length to height.

  • Pushing the carousels/cylinders along a inclined plane?
• Other types of wedges may be used with a lever, as a form of fulcrum for raising objects
• a more substantial wedge under the front wheels of a car will stop it from rolling forward.

  • A wedge would keep it at the position. reducing load on system
• A screw is an inclined plane in the shape of a helix, wrapped around an axis or cylinder
• When one rotates a screw of a given pitch, the applied force describes a circle whose area may be calculated as 2πL, where L is the lever arm. This figure, when divided by the pitch, is the same as the ratio between the distance of force input to force output.

  • Mech Adv Low, but Holding power high? perhaps it can be a mechanism to drive the carousels.
• mechanical advantage is usually low
• what it lacks in mechanical advantage, it more than makes up in its holding power

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• F₁R₁ − F₂R₂ = 0.