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A block of mass m is connected two sprin...

A block of mass m is connected two springs of spring constant 2k annd k , respectively , as shown in the vertical plane. At equilibrium , both springs are compressed by same length. If suddenly lower spring is cut, then acceleration of block, just after spring cut , is

A

2g downward

B

g downward

C

g upward

D

None of these

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The correct Answer is:
A
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Knowledge Check

  • System shown in fig is in equilibrium and at rest. The spring and string are massless now the string is cut. The acceleration of mass 2m and m just after the string is cut will be:

    A
    `g//2` upwards, g downwards
    B
    g upwards, `g//2` downwards
    C
    g upwards, 2g downwards
    D
    2g upwards, g downwards

  • A block of mass m is connected to two indentical springs of spring constant k which are in turn connected to fixed supports as shown in the figure. Find the time period for small oscillations of the block.

    A
    `2pi sqrt(m/k)`
    B
    `2pisqrt(m/(2k))`
    C
    `2pisqrt((2m)/k)`
    D
    `pisqrt(m/(2k))`

  • Two block of mass 2kg are connected by a massless ideal spring of spring contant K=10N//m . The upper block is suspended from roof by a light string A . The system shown is in equilibrium. The string A is now cut, the acceleration of upper block just after the string A is cut will be (g=10m//s^(2) .

    A
    `0m//s^(2)`
    B
    `10m//s^(2)`
    C
    `15m//s^(2)`
    D
    `20m//s^(2)`

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