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Newton's Laws of Motion Flashcards

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

Read the first 7 Newton's Laws of Motion flashcards as text

  1. A 10 kg box is pushed with a net force of 30 N. What is the acceleration of the box?

    Answer: 3 m/s²

    Newton's second law: a = F/m = 30 N / 10 kg = 3 m/s².

  2. Which of Newton's laws explains why passengers lurch forward when a car suddenly brakes?

    Answer: Newton's First Law

    Newton's First Law states objects in motion stay in motion; passengers continue moving forward when the car stops.

  3. A rocket expels gas downward to propel itself upward. This is best explained by:

    Answer: Newton's Third Law

    Newton's Third Law: the rocket pushes gas down, and the gas pushes the rocket up with an equal and opposite force.

  4. If the mass of an object doubles while the net force stays the same, the acceleration will:

    Answer: Halve

    Since a = F/m, doubling mass with constant force cuts acceleration in half.

  5. An object sitting on a table remains at rest. According to Newton's First Law, this means:

    Answer: The net force on it is zero

    An object at rest has balanced (zero net) forces; gravity and the normal force cancel each other.

  6. Two ice skaters push off each other. Skater A has twice the mass of Skater B. Compared to Skater B, Skater A will have:

    Answer: Half the acceleration

    They experience equal forces (Third Law), but a = F/m means greater mass gives less acceleration.

  7. Which quantity is measured in Newtons (N)?

    Answer: Force

    The Newton is the SI unit of force, defined as 1 kg·m/s².