Exercise
Form 12: Mechanical Efficiency & Friction
In this engaging exercise, students will explore the concepts of mechanical efficiency and friction through hands-on experiments and calculations, empowering them to understand how these forces impact energy transfer and work in real-world applications. Dive into interactive challenges that illustrate the significance of friction in machinery and everyday life while enhancing problem-solving skills!
Questions
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MultiChoice
What is mechanical efficiency?
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MultiChoice
What is the formula for mechanical efficiency?
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MultiChoice
Why can no real machine achieve 100% mechanical efficiency?
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MultiChoice
If a machine receives 200 J of work input and produces 150 J of work output, what is efficiency?
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MultiChoice
How does adding lubrication affect the efficiency of a machine?
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MultiChoice
If a pulley system has an IMA of 5 and an AMA of 4, what is its efficiency?
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MultiChoice
What happens to energy 'lost' in a simple machine due to friction?
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MultiChoice
An ideal machine is defined as a theoretical machine with an efficiency of:
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MultiChoice
To achieve 80% efficiency, a ramp receiving 500 J of work input must deliver how much work output?
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MultiChoice
Which modification would INCREASE the mechanical efficiency of an inclined plane?
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MultiChoice
If work output equals 300 J and work input equals 300 J, the machine is classified as:
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MultiChoice
Mechanical efficiency can also be calculated using which ratio of mechanical advantages?