# EFFICIENCY of MACHINES. Simple machines are evaluated on the basis of efficiency and mechanical advantage.While it is possible to obtain a larger force from a machine than the force exerted upon it, this refers only to force and not energy; according to the law of conservation of energy, “more work cannot be obtained from a machine than the energy supplied to it”.

A machine has an efficiency of 70%. How much work does the machine do when 20,000 J of work is done on it? 14,000 J 28,600 J 1,400,000 J 2,860,000 J 2 See answers AL2006 AL2006 You oughtta be able to do this one. The "efficiency" is just the portion of the input work that

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A machine uses an effort of 500 N to raise a load of 800 N. it has an efficiency of 80%. Determine its velocity ratio. Answers QN22 An 11KV/400V delta/star 3-phase transformer has balanced star connected load of 60 KW at p.f. of 80% lagging per phase. Calculate the primary line current. If the transformer has iron loss of 1.0 KW, calculate the approximate efficiency of the transformer.

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### QN22 An 11KV/400V delta/star 3-phase transformer has balanced star connected load of 60 KW at p.f. of 80% lagging per phase. Calculate the primary line current. If the transformer has iron loss of 1.0 KW, calculate the approximate efficiency of the transformer.

| Study.com. Science Simple machine. A pulley system has a velocity ratio of 4 and an efficiency of 80%.

A Carnot engine operating between two given temperatures has the greatest possible efficiency of any heat engine operating between these two temperatures. If the lever has an efficiency of 88.7%, how far did the boy have to push his end of the lever? d cm m d d d IMA IMA IMA N N F F AMA IMA AMA efficiency e e r e e r 13 6. 26 81. 42 0. 8142 13 6.

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The maximum efficiency is achieved under the fully loaded condition. The "efficiency" is just the portion of the input work that comes out in a useful form. If the efficiency is 70%, that tells you that however much work you put INto the machine, the machine will do 70% of that much work for you at the output side.

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### Physics. 1 Answers. Mr. Franklin uses a machine that has an efficiency of 80%. The machine applies a force of 800 N through a distance of 20 m. Mr. Franklin applies a force of 50 N on the machine.

Hence, the term efficiency is used to represent the performance of a machine. Existence of friction in moving parts of machines has brought the concept of efficiency of a machine. The gas turbine efficiency, which is the function of turbine inlet temperature and the compression ratios, has increased significantly in the past decades, making it possible to reach 40–45% efficiency in simple cycle and beyond 60% efficiency (LHV) in natural gas fired combined cycles, a remarkable improvement over the E-class gas turbine used in the Buggenum IGCC plant and today’s F A machine is driven by a 50 kg mass falling at a rate of 10.0 m in 5s. It lifts n load of 250 kgf. Taking the force of gravity on 1 kg mass as 10 N. Calculate the power input to the machine. If the efficiency of the machine is 60%, find the height to which the load is raised in 5s. Greater energy efficiency can reduce energy costs to consumers, enhance environmental quality, maintain and enhance our standard of living, increase our freedom and energy security, and promote a strong economy.

## The "efficiency" is just the portion of the input work that comes out in a useful form. If the efficiency is 70%, that tells you that however much work you put INto the machine, the machine will do 70% of that much work for you at the output side. Put 20,000 J in out comes (0.70) x (20,000 J) = 14,000 J .

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But this is just They have electricity, but the question is: How many have washing A machine's MA is the number of times a force exerted on a machine is multiplied by If tight scissors have an efficiency of 50 percent, how much of your work is the most efficient way to solve this question is to keep everything in terms of those variables.