Chapter 4-6 Newton's Laws

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Chapter 4-6 Newton

Conceptual Physics


Questions and Answers
  • 1. 

    Describe what is happening here using the vocabulary words, tangent and First Law.

  • 2. 

    Type in the SI unit for mass, weight, force. (use commas to separate your answers)

    Explanation
    The SI unit for mass is kilogram (kg), the SI unit for weight is Newton (N), and the SI unit for force is also Newton (N).

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  • 3. 

    What are the British units for force, weight, and mass?  (use commas to separate your answers)

    Explanation
    The British units for force, weight, and mass are pound, pound, and slug. Additionally, 1lb, 1lb, and lb are also used as units for force, weight, and mass in the British system.

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  • 4. 

    What are the cgs system units for force, mass, weight?

    Explanation
    The correct answer is dyne, gram, dyne. In the cgs system, force is measured in dynes, mass is measured in grams, and weight is also measured in dynes. The dyne is the unit of force in the cgs system, the gram is the unit of mass, and weight is simply the force exerted on an object due to gravity, which is also measured in dynes. Therefore, the units for force, mass, and weight in the cgs system are dyne, gram, dyne.

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  • 5. 

    What formala would you use to figure out how much a 60KG person weighs on earth?

    • A.

      W=mg

    • B.

      V=d/t

    • C.

      F=ma

    • D.

      W=fd

    Correct Answer
    A. W=mg
    Explanation
    The formula w=mg is used to calculate the weight of an object on Earth. Here, "w" represents weight, "m" represents mass, and "g" represents the acceleration due to gravity. By multiplying the mass of the person (60KG) with the acceleration due to gravity on Earth, the formula gives us the weight of the person on Earth.

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  • 6. 

    How much does a 60kg person weigh on earth?

    Correct Answer
    588N, 600N, 588 N, 600 N
    Explanation
    W=mg
    W=60kg(9.8m/s/s) OR 60(10)
    W=588 N OR 600 N

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  • 7. 

     *Mass is a measurement of the amount of matter something contains, while Weight is the measurement of the pull of gravity on an object. *Mass is measured by using a balance comparing a known amount of matter to an unknown amount of matter. Weight is measured on a scale. *The Mass of an object doesn't change when an object's location changes. Weight, on the other hand does change with location. THERFORE, if I have a mass of 2.5kg on Earth my mass on Pluto would be__________

    Correct Answer
    2.5kg, 2.5 kg
    Explanation
    Mass does NOT change when the object goes to a different location.

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  • 8. 

    * Mass is a measurement of the amount of matter something contains, while Weight is the measurement of the pull of gravity on an object. * Mass is measured by using a balance comparing a known amount of matter to an unknown amount of matter. Weight is measured on a scale. *The Mass of an object doesn't change when an object's location changes. Weight, on the other hand does change with location. THEREFORE, if an object has a mass of 2.5kg on Earth and g on Pluto 0.6m/s2 my weight on Pluto would be ______

    Correct Answer
    1.5 N, 1.5N
    Explanation
    W=mg
    W=(2.5 kg)(0.6 m/s/s)
    W= 1.5N

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  • 9. 

    The more mass an object has the more _____________ the object has.

    Correct Answer
    inertia, weight
    Explanation
    Still stumped? Look up inertia.

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  • 10. 

    When you double the force acting on an object the acceleration is doubled. Is this true?

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    When you double the force acting on an object, according to Newton's second law of motion, the acceleration of the object will also double. This is because the force and acceleration are directly proportional to each other. So, if you increase the force applied to an object, the object will experience a greater acceleration in the same direction. Therefore, the statement "When you double the force acting on an object the acceleration is doubled" is true.

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  • 11. 

    If an object weighs 10 Newtons on the Earth and another object weighs 10 Newtons on the moon, which one has the least mass?

    Correct Answer
    Earth
    Explanation
    The Earth has a greater gravitational pull than the moon, therefore the mass on the Earth is larger.

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  • 12. 

    How much force must be applied to a toy car that has a mass of .25kg to achieve an acceleration of 2.4m/s2?

    • A.

      24.5N

    • B.

      .6N

    • C.

      .06N

    • D.

      2.45N

    Correct Answer
    B. .6N
    Explanation
    To calculate the force required to achieve a certain acceleration, we can use Newton's second law of motion, which states that force is equal to mass multiplied by acceleration (F=ma). In this case, the mass of the toy car is given as 0.25kg and the desired acceleration is 2.4m/s^2. Plugging these values into the formula, we get F = 0.25kg * 2.4m/s^2 = 0.6N. Therefore, the correct answer is 0.6N.

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  • Nov 18, 2013
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