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Why do spring balances show wrong readin...

Why do spring balances show wrong readings after they have been used for a long time?

Text Solution

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Spring balances show wrong readings after long use because after long use material crosses its elastic limit. In this condition, on applying small stress (force) it undergoes strain which is not proportional to applied stress. So spring balances show wrong readings after long use.
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Knowledge Check

  • The spring balance does not read properly after a long use, because

    A
    the elasticity of spring increases
    B
    the elasticity decreases
    C
    its plastic power decreases
    D
    its plastic power increases

  • The spring balance does not read properly after a long use, because

    A
    the elasticity of spring increases
    B
    the elasticity decreases
    C
    its plastic power decreases
    D
    its plastic power increases

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