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- Basic Math and Science Newton's Laws of Motion Questions and Answers Flashcards

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  1. A 5 kg box is pushed with a net force of 20 N. What is its acceleration?

    Answer: 4 m/s²

    By Newton's Second Law, a = F/m = 20/5 = 4 m/s².

  2. Which of Newton's laws explains why a rocket accelerates when it expels gas?

    Answer: Third Law

    The rocket expels gas backward (action) and is pushed forward (reaction), illustrating Newton's Third Law.

  3. A car traveling at 30 m/s comes to a sudden stop. A passenger continues to move forward. This is best explained by:

    Answer: Newton's First Law

    Newton's First Law states an object in motion stays in motion unless acted upon by an external force.

  4. Two objects, one with mass 2 kg and one with mass 8 kg, experience the same net force. Which has the greater acceleration?

    Answer: The 2 kg object

    Since a = F/m, the smaller mass (2 kg) produces a greater acceleration for the same force.

  5. A person pushes a wall with 50 N of force. According to Newton's Third Law, the wall pushes back with:

    Answer: 50 N

    Newton's Third Law states action and reaction forces are equal in magnitude but opposite in direction.

  6. An object at rest on a table has zero net force acting on it. This is consistent with which law?

    Answer: Newton's First Law

    Newton's First Law states that an object at rest remains at rest when the net force is zero.

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

    Answer: 30 N

    By Newton's Second Law, F = ma = 10 × 3 = 30 N.