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A rectangular block of wood of density 8...

A rectangular block of wood of density `800kgm^(-3)` having a mass of 2 kg is pushed in to water so that it is completely submerged and then released. Neglecting viscous forces, the initial acceleration of the block will be `(g=10(m)/(s^(2)))`

A

`1.25 m//s^(2)` downward

B

`2.5 m//s^(2)` upward

C

`1.25 m//s^(2)`upward

D

`2.5 m//s^(2)` downward

Text Solution

Verified by Experts

The correct Answer is:
B
`a_("net")=("Force of buoancy - weight of wooden block")/("mass of the body")`
`a=(F_(b)-W)/(m)=(Vd_(w)g-Vd_(B)g)/(Vd_(B))`
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Knowledge Check

  • A small block of wood of relative density 0.5 is submerged in water. When the block is released, it stats moving upwards, the acceleration of the block is (g=10 ms^(-2))

    A
    `5 ms^(-2)`
    B
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    C
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    D
    `15 ms^(-2)`

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    B
    `5 m//s^(2)`
    C
    `10 m//s^(2)`
    D
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    B
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    D
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