ocr: MEASURING FORCE A spring balance uses a coil spring to measure the weight EXIENDED ofan object. Springs provide SPRING a useful way to measure force because the amount that a SCALE spring distorts depends on the force bending it. Ifthe force - is doubled, the spring stretches twice as much (as long as the force: is not too LOAD large or too small).
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(Dorling Kindersley).iso/principl/qspr/qspr0x.dib/qspr0x.png)