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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.