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A spring of young's modulus 2 xx 10^11 ...

A spring of young's modulus `2 xx 10^11` pa is suspended vertically and subjected to a load of 5 kg and elongation is 2 mm. when the load is doubled - match the following `(g = 9.8 m//s^2)`

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B
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Knowledge Check

  • A spring of young.s modulus 2xx10^(11) pa is suspended vertically and subjected to a load of 5 kg and elongation is 2 mm. when the load is doubled - match the following (g=9.8m//s^(2)) {:("Section-A","Section-B"),("a) Elongating force","e) 4 mm"), ("b) Stress","f) Unchanged"),("c) Elongation", "g) 98 N"), ("d) Young.s modulus","h) Doubled"):}

    A
    a-h, b-g, c-f, d-e
    B
    a-g, b-h, c-e, d-f
    C
    a-e, b-f, c-g, d-h
    D
    a-f, b-e, c-g, d-h

  • A load of 1 kg weight is a attached to one end of a steel wire of area of cros-section 3 mm^(2) and Young's modulus 10^11 Nm^-2 . The other end is suspended vertically from a hook on a wall, then the load is pulled horizontally and released. When the load passes through its lowest position the fractional change in length is (10ms^-2)

    A
    `0.3xx10^-4`
    B
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    C
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    D
    `0.3xx10^4`

  • Frequency of a particle executing SHM is 10Hz. The particle is suspended from a vertical spring.At the highest point of its oscillation the spring is unstretched. Maximum speed of the particle is (g = 10m//s^2)

    A
    `2 pi m//s`
    B
    `pi m//s`
    C
    `1/pi m//s`
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    `1/(2pi) m//s`

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