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6. When a spring goes past its elastic limit, what happens?

  • the spring will no longer return to its original length when the force is removed.
  • the spring will become hot and break.
  • the spring will immediately return to its original length.
  • the spring will snap.

7. Which one of these is not a contact force?

  • gravity
  • water resistance
  • air resistance
  • magnetism

8. The extension of a spring is ______ to the force on it

  • half
  • double
  • proportional
  • dependent

9. Upwards forces from water or air are called what?

  • Contact
  • Aero dynamism
  • Upthrust
  • Gravity

10. What is the formula for working out pressure?

  • force = pressure x area
  • pressure = force ÷ area
  • force = pressure ÷ area
  • pressure = force x area

11. If the spring is stretched too far -

  • the extension stops being proportional to the force.
  • it will become tangled.
  • it will snap.
  • the proportion will stop being extensional to the force.