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A rod of weight w is supported by two pa...

A rod of weight w is supported by two parallel knife edges A and B and is in equilibrium in a horizontal position. The knives are at a distance d from each other. The centre of mass of the rod is at distance x from A. The normal reaction on A is.. And on B is......

A

`(Wx)/(d)`

B

`(Wd)/(x)`

C

`(W(d-x))/(x)`

D

`(W(d-x))/(d)`

Text Solution

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The correct Answer is:
D
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Knowledge Check

  • A rod of weight w is supported by two parallel knife edges A and B and is in equilibrium in a horizontal position. The knives are at a distance d from each other. The centre of mass of the rod is at a distance x from A .

    A
    the normal reaction at `A` is `(wx)/(d)`
    B
    the normal reaction at `A` is `(w(d - x))/(d)`
    C
    the normal reaction ar `B` is `(wx)/(d)`
    D
    the normal reaction at `B` is `(w(d - x))/(d)`.

  • A uniform metre rod is bent into L shape with the bent arms at 90^@ to each other. The distance of the centre of mass from the bent point is

    A
    `L/(4sqrt(2))m`
    B
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    C
    `L/(sqrt(2))m`
    D
    `L/(8sqrt(2))m`

  • A uniform rod AB hinged about a fixed point P is initially vertical. A rod is released from vertical position. When rod is in horizontal position: The acceleration of the centre of mass of the rod is

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    D
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