___________
Science
Hidden forces

Starter quiz

  • Complete the sentence: The increase in length of a spring with a force acting on it is the ______.
    • 'extension' ✓
  • Which word is used to describe something that returns to its original shape when the forces acting on it are removed?
    • bouncy
    • rubber
    • elastic  ✓
    • flexible
    • stiff
  • What is the extension of this spring when a force of 30 N acts on it?
    What is the extension of this spring when a force of 30 N acts on it?
    • 0 cm
    • 5 cm
    • 10 cm  ✓
    • 20 cm
    • 25 cm
  • Which of these is a statement of Hooke's law?
    • The total length of a spring is directly proportional to the force acting on it.
    • The extension of a spring is directly proportional to the force acting on it.  ✓
    • The extension of a spring is directly proportional to its mass.
    • The extension of a spring is inversely proportional to the force acting on it.
    • The total length of a spring is inversely proportional to the force on it.
  • According to the graph, which of these statements are true?
    According to the graph, which of these statements are true?
    • The spring obeys Hooke's law for forces below 40 N.  ✓
    • The spring never obeys Hooke's law.
    • The spring does not obey Hooke's law for forces over 45 N.  ✓
    • The spring does not obey Hooke's law for forces less than 45 N.
    • The spring obeys Hooke's law for forces above 45 N.
  • A pupil collects the data shown during a spring experiment. Use the data to predict the extension if the force used was 8 N. Give your answer in cm to the nearest whole number.
    A pupil collects the data shown during a spring experiment. Use the data to predict the extension if the force used was 8 N. Give your answer in cm to the nearest whole number.
    • '32 cm' ✓
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