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Mechanical Aptitude Flashcards

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

Read the first 6 Mechanical Aptitude flashcards as text

  1. A wheelbarrow is an example of which class of lever?

    Answer: Second class

    A wheelbarrow is a second-class lever: fulcrum (wheel) at one end, effort (handles) at the other, load between them.

  2. If a 20-tooth gear drives a 60-tooth gear, what is the gear ratio?

    Answer: 1:3

    Gear ratio = driving gear teeth : driven gear teeth = 20:60 = 1:3.

  3. Which statement about friction is correct?

    Answer: Static friction is generally greater than kinetic friction

    Static friction (resistance to starting motion) is typically greater than kinetic friction (resistance during motion).

  4. A spring scale reads 10 pounds when a box is hung from it. Pulled horizontally on a table, the scale reads 4 pounds to start sliding. What is the coefficient of static friction?

    Answer: 0.4

    Coefficient of static friction = friction force / normal force = 4 / 10 = 0.4.

  5. What happens to mechanical advantage as an inclined plane's angle decreases (becomes more gradual)?

    Answer: It increases

    A more gradual inclined plane has greater mechanical advantage: less force needed but longer distance.

  6. A ball is thrown straight up into the air. At the highest point of its trajectory, what is its velocity?

    Answer: Zero

    At the highest point, the ball momentarily stops before falling back down, so its velocity is zero.