Physics: Force and Units of Measurement
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Questions and Answers

What is the SI unit of measuring force?

  • Metre
  • Newton (correct)
  • Dyne
  • Kilogram
  • When holding a 1kg weight in your hand, approximately how much force is applied on your hand?

  • 5 Newton
  • 12 Newton
  • 9.8 Newton (correct)
  • 3 Newton
  • What is the CGS unit of force?

  • Dyne (correct)
  • Kilogram
  • Newton
  • Metre
  • When a piece of brick tied with a string is held in the air and remains stationary, what force is acting on it?

    <p>Gravitational force</p> Signup and view all the answers

    Why do the weight and the piece of brick remain stationary even though Earth's pull is acting on them?

    <p>Due to lack of acceleration</p> Signup and view all the answers

    According to Newton's third law of motion, what happens when two equal and opposite forces are acting on an object?

    <p>The net force on the object is zero.</p> Signup and view all the answers

    Why is there no acceleration when a brick is suspended from a string?

    <p>An equal and opposite force is acting upwards on the brick.</p> Signup and view all the answers

    What happens to the spring when a greater weight is hung from it?

    <p>The spring expands further.</p> Signup and view all the answers

    If a weight hanging from a spring is replaced by something double its weight, what would be the effect on the spring?

    <p>The spring will expand more.</p> Signup and view all the answers

    In the scenario of a weight hanging from a string, why is there no acceleration even when forces are acting?

    <p>The forces counteract each other resulting in zero net force.</p> Signup and view all the answers

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