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6 Cards in this Set
- Front
- Back
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A simple machine is one that receives energy by means of a single applied force and produces work A) A mechanical device B) Multiple output forces C) A single output force D) Distance moved |
C) A single output force |
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A simple wheel and axle has a wheel diameter of 3 m and an axle diameter of 25 cm. What effort is required to raise 850 kg if the efficiency is 87%? A) 100.5 N B) 986 N C) 798.7 N D) 563.2 N E) 81 N |
C) 798.7 N |
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A wheel and axle has a mechanical advantage of 20. Calculate the diameter of the wheel if the axle has a diameter of 5 cm. A) 4 cm B) 8 cm C) 50 cm D) 10 cm E) 100 cm |
E) 100 cm |
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A small hand pump is 850 mm from the handle to the plunger. The fulcrum is attached in one end and the load plunger is located 50 mm from the fulcrum. An effort force of 600 N is applied downward from the opposite end of the fulcrum. Find the force exerted by the load plunger and the mechanical advantage of the lever. A) 1080 N and 18 B) 1020 N and 17 C) 10 800 N and 18 D) 108 N and 18 E) 10 200 N and 17 |
C) 10 800 N and 18 |
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Which of the following statements about simple machines is false? A) The machine produces work by means of a single output force B) Work output is the product of the load and the distance moved by the load C) Work input is greater than work output D) The machine receives energy by means of a single applied force E) The machine receives energy by means of two or more applied forces |
E) The machine receives energy by means of two or more applied forces |
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Efficiency is: A) Work output - work input B) Work output ÷ work input C) Work input × work output D) Work output + work inputE) Work input ÷ work output |
B) Work output ÷ work input |
