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Mechanical Reasoning Concepts Flashcards

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

Read the first 7 Mechanical Reasoning Concepts flashcards as text

  1. A 10 kg object is accelerated at 3 m/s². What net force is acting on it?

    Answer: 30 N

    Newton's second law: F = ma = 10 × 3 = 30 N.

  2. Which type of lever has the fulcrum between the effort and the load?

    Answer: First-class lever

    A first-class lever has the fulcrum between effort and load, like a seesaw or crowbar.

  3. A car engine produces 150 kW of power and propels the car at 30 m/s. What is the driving force on the car?

    Answer: 5000 N

    Power = force × velocity; force = P/v = 150,000 / 30 = 5000 N.

  4. A shaft transmits torque from a motor to a wheel. If the shaft's diameter is doubled, by what factor does its torsional strength increase (approximately)?

    Answer: 16×

    Torsional strength scales with the fourth power of diameter; 2⁴ = 16×.

  5. Ball bearings are used in rotating machinery primarily to:

    Answer: Reduce friction and support radial loads

    Ball bearings replace sliding friction with rolling friction, greatly reducing energy loss while supporting loads.

  6. A screw has a pitch of 2 mm. How many full turns are needed to advance the screw 10 mm into a surface?

    Answer: 5 turns

    Turns = distance / pitch = 10 mm / 2 mm = 5 turns.

  7. An object moving in a circle at constant speed is experiencing a net force directed:

    Answer: Toward the center

    Centripetal force always points toward the center of the circle, causing the object to follow a curved path.