Presentation top top theme: "Mechanical Advantage. Can be expressed as the ratio of: 1)the resistance pressure (i.e. The load) to the initiative force forced to move it 2)the distance."— Presentation transcript:




You are watching: The ratio of resistance force to effort force

1 Mechanical benefit

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2 can be expressed as the ratio of: 1)the resistance force (i.e. The load) to the initiative force required to relocate it 2)the distance traveled through the initiative force to the street traveled by the resistance pressure These calculated ratios allow designers come manipulate a style to readjust speed, distance, force, and also function. Defines how much the machine helps you, i.e. Just how much benefit do you acquire from making use of it?

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3 A mechanical advantage of 4:1 tells us what around a mechanism? effort force travel 4 times farther than the resistance force would have. Magnitude of Force: street Traveled by Forces: initiative force is 4 times less than the resistance force. In other words the work-related is 4x easier, or you deserve to do 4x more.

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4 One is the magic number If MA is greater than 1: less initiative force but greater effort distance are compelled to get rid of a provided resistance force If MA is much less than 1: greater effort force yet less initiative distance are compelled to get rid of a offered resistance pressure MA is never much less than zero.

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5 Theory-based calculate (i.e. Style prediction) used in efficiency and safety factor design calculations frictional losses room not bring away into factor to consider Ratio of force distances D E = distance traveled by initiative force D R = distance traveled through resistance pressure

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6 Inquiry-based calculation (i.e. You actually measure it) used in performance calculations frictional losses space taken into factor to consider Ratio of pressure magnitudes F E = size of initiative force F R = size of resistance force

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7 have the right to you think that a device that has a mechanical advantage greater than 1?

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8 have the right to you think that a machine that has a mechanical advantage less than 1?

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9 The force applied on things times the distance traveled by the object Initial position last position street (d) pressure (F) occupational = pressure * distance = F*d *The force needed to conquer friction is no considered*

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10 The product of the effort times the distance traveled will be the exact same regardless that the system mechanical benefit

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11 Microsoft, Inc. (2008).

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Clip Art. Re-cover January 10, 2008, from http://office.microsoft.com/en-us/clipart/default.aspx

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