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Gears, Pulleys, and Levers Flashcards

7 cards from real EIAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. A gear with 48 teeth meshes with a gear with 16 teeth. If the smaller gear rotates at 900 RPM, what is the speed of the larger gear?

    Answer: 300 RPM

    Gear ratio is 48:16 = 3:1, so the larger gear turns at 900 ÷ 3 = 300 RPM.

  2. In a compound pulley system with 4 rope segments supporting the load, what is the mechanical advantage?

    Answer: 4

    The mechanical advantage of a compound pulley equals the number of rope segments supporting the moving block.

  3. A first-class lever has the fulcrum between the effort and the load. Which everyday tool is an example?

    Answer: Seesaw

    A seesaw has the fulcrum in the middle with effort and load on opposite ends, making it a first-class lever.

  4. When two gears mesh, they always rotate in:

    Answer: Opposite directions

    Meshing gears always rotate in opposite directions because the teeth interlock and push against each other.

  5. A load of 200 lb is placed 2 feet from the fulcrum. How much effort is needed 8 feet from the fulcrum on the other side to balance it?

    Answer: 50 lb

    Using lever balance: 200 × 2 = Effort × 8, so Effort = 400 ÷ 8 = 50 lb.

  6. A fixed pulley changes the direction of force but provides a mechanical advantage of:

    Answer: 1

    A single fixed pulley only redirects the force; it provides a mechanical advantage of exactly 1.

  7. If a gear train consists of gears with 10, 20, and 40 teeth in series, what is the overall gear ratio from first to last?

    Answer: 1:4

    The overall ratio is (20/10) × (40/20) = 2 × 2 = 4, so the output gear turns at 1/4 the input speed (1:4).