Why is easy to use long spanner than short spanner

Physics

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Answer

Ni rahisi kutumia spanner ndefu kuliko spanner fupi kwa sababu ya dhana ya nguvu mzunguko (torque) au moment of force.

Step-by-step solution

3 steps
  1. Fafanua nguvu mzunguko.

    Nguvu mzunguko ni kipimo cha jinsi nguvu inavyoweza kusababisha kitu kuzunguka. Inakokotolewa kama bidhaa ya nguvu inayotumika na umbali wa perpendicular kutoka sehemu ya mzunguko (pivot) hadi mahali nguvu inapotumika.

  2. Linganisha spanner ndefu na fupi.

    Spanner ndefu hutoa mkono wa lever (lever arm) mrefu zaidi. Hii inamaanisha kuwa umbali kutoka kwenye nati/bolti (sehemu ya mzunguko) hadi mahali unaposhika spanner ni mrefu.

  3. Eleza athari ya urefu.

    Kwa kuwa nguvu mzunguko = nguvu ×\times umbali, spanner ndefu inaruhusu kutumia nguvu ndogo kufikia nguvu mzunguko sawa au kubwa zaidi. Hii inafanya iwe rahisi kulegeza au kukaza nati/bolti, hasa zile zilizokaza sana.

    Jibu:
    Ni rahisi kutumia spanner ndefu kwa sababu inatoa mkono wa lever mrefu zaidi. Hii inamaanisha kwamba kwa kutumia nguvu ileile, spanner ndefu inazalisha nguvu mzunguko (torque) kubwa zaidi, au unaweza kutumia nguvu ndogo kufikia nguvu mzunguko inayohitajika kulegeza au kukaza nati/bolti.

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