Mechanical Advantage and Efficiency - Monroe Co Schools KY

Mechanical Advantage and Efficiency - Monroe Co Schools KY

Mechanical Advantage and Efficiency Mechanical Advantage A machines MA is the number of times a force exerted on a machine is multiplied by the machine. The MA is a ratio between the output and input force MA = Output Force / Input Force If you exert a force of 20 N on a can opener, and the opener exerts a force of 60 N on the can, the ideal mechanical advantage of the can opener is A. B. C. D. 86% 6 2 1200 3 5% A. 1 2 3 4 5 6

7 8 9 10 11 12 21 22 23 24 25 26 27 28 29 30 31 32 13 14 15

5% 5% B. C. 16 17 D. 18 19 20 Mechanical Advantage > 1 A machine with a mechanical advantage of greater than 1 multiplies the input force. Examples: can opener a ramp Mechanical Advantage < 1 A machine with a mechanical advantage of less than 1 does not multiply the force but increases the distance and speed. Example: Hockey Stick Paper Fan Mechanical Advantage = 1 A machine with a mechanical advantage of 1 means that a machine changes the direction of the force. Example: Rope The mechanical advantage of a

machine that changes only the direction of force is 43% A. 1 B. Less than 1 C. Greater than 1 D. 0 39% 13% 4% A. 1 2 3 4 5 6 7 8 9 10 11 12 21 22

23 24 25 26 27 28 29 30 31 32 B. 13 14 C. 15 D. 16 17 18 19 20

Efficiency of Machines To calculate the efficiency of a machine, divide the output work by the input work and multiply the result by 100 percent. Efficiency = Output work * 100% Input work The efficiency of a machine compares A. Force to mass B. Output work to input work. C. Force to friction D. Friction to mass 95% 5% 0% A. 1 2 3 4 5 6 7 8 9 10

11 12 21 22 23 24 25 26 27 28 29 30 31 32 13 B. 14 0% C. 15 16

D. 17 18 19 20 Actual Mechanical Advantage The actual mechanical advantage is the mechanical advantage that a machine provides in a real situation. Ideal Mechanical Advantage The ideal mechanical advantage is the mechanical advantage of a machine without friction. The more efficient a machine is, the closer the actual mechanical advantage is to the ideal mechanical advantage. An ideal machine would have an efficiency of 87% A. B. C. D. 1 percent 10 percent 50 percent 100 percent 9% 4%

0% A. 1 2 3 4 5 6 7 8 9 10 11 12 21 22 23 24 25 26 27 28

29 30 31 32 B. 13 14 C. 15 D. 16 17 18 19 20 If tight scissors have an efficiency of 50 percent, how much of your work is wasted overcoming friction? A. B. C. D. All of it None of it One half of it 10 percent of it

90% 5% 0% A. 1 2 3 4 5 6 7 8 9 10 11 12 21 22 23 24 25 26

27 28 29 30 31 32 13 B. 14 5% C. 15 16 D. 17 18 19 20 Without friction there would be A. Less machine efficiency. B. Greater output work than input work. C. Greater input work than output work. D. Equal input and output

work. 30% 2 3 4 5 6 7 8 9 10 11 12 21 22 23 24 25 26 27 28 29

30 31 32 13 30% 9% A. 1 30% B. 14 15 C. 16 D. 17 18 19 20

Recently Viewed Presentations

  • Accounting Basics, Part 2

    Accounting Basics, Part 2

    The ledger contributes to the name "T" accounts by organizing debits on the left side and credits on the right side. There are other acceptable ledger formats, but each will use the "T" account format. Bookkeepers typically do not record...
  • NoSQL with Mongo DB and R Bob Wakefield

    NoSQL with Mongo DB and R Bob Wakefield

    NoSQL with Mongo DB and R. This is a discussion. Feel free to hop in and correct me if I say something crazy.
  • Revenue Recognition Deep Dive - Institute of Internal Auditors

    Revenue Recognition Deep Dive - Institute of Internal Auditors

    Acceptable estimation methods include, (1) the adjusted market assessment approach, (2) the expected cost plus margin approach, and (3) the residual approach (when the stand-alone selling price is not directly observable and is either highly variable or uncertain).
  • Exploiting System Diversity in Peer-to-Peer Publish-Subscribe ...

    Exploiting System Diversity in Peer-to-Peer Publish-Subscribe ...

    Exploiting System Diversity in Peer-to-Peer Publish-Subscribe Systems. Final Exam of Jay A. Patel (April 1, 2009)
  • Marian Forgan Senior Verifier  Introduction of Revised Award

    Marian Forgan Senior Verifier Introduction of Revised Award

    www.sqa.org.uk I 0303 333 0330. Marian Forgan. Senior Verifier. Introduction of Revised Award. Qualification Verification Summary Report. ... Develop the use of SOLAR. Areas for Development. Adhering to centre's IV processes. Looking Forward. 3 HN visits arranged. 6 NC visits...
  • Chapter 15: The ferment of reform and culture

    Chapter 15: The ferment of reform and culture

    The Scientific Revolution. The "Scientific Revolution" also sparked deism. Just as the solar system, mathematics, and physical laws and properties of the universe were being figured out, the principles of scientific inquiry were applied to religion.
  • Genomic Biotech for Environmental Monitoring: Phylogeography & connectivity

    Genomic Biotech for Environmental Monitoring: Phylogeography & connectivity

    Genomic Biotech for Environmental Monitoring: Phylogeography & connectivity among marine populationsas inferred from complete mtDNA genome sequencesSteven M CarrTerra Nova Genomics, Inc.&Dept of Biology, Memorial University of NewfoundlandSt John's NL, Canada2nd International Conference on OceanographyLas Vegas NV, 21 July 2014
  • Fall 2004, CIS, Temple University CIS527: Data Warehousing,

    Fall 2004, CIS, Temple University CIS527: Data Warehousing,

    Multiple scans of database: Needs (n +1 ) scans, n is the length of the longest pattern ECLAT: Another Method for Frequent Itemset Generation ECLAT: for each item, store a list of transaction ids (tids); vertical data layout ECLAT: Another...