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In the figure shown, A and B are two sho...

In the figure shown, `A` and `B` are two short steel rods each of cross-sectional area `5 cm^(2)`. The lower ends of `A` and `B` are welded to a fixed plate `CD`. The upper end of `A` is welded to the `L`-shaped piece `EFG`, which can slide without friction on upper end of `B`. A horizontal pull of `1200 N` is exerted at `G` as shown. Neglect the weight of `EFG`.

Mark out the correct statement(s).

A

Shearing stress in `A` is zero

B

Shearing stress in `B` is zero

C

Shearing stress in both `A` and `B` is zero

D

Shearing stress in both `A` and `B` is non-zero.

Text Solution

Verified by Experts

The correct Answer is:
B

since at `A` it is welded it can take longitudinal and shear forces. `A` and `B` there is not friction, So it can take only normal force but not tangential shear force
`F xx 4 = 1200 xx 3, f = 900`
Stress `= Z = (900)/(5) = 180`
Stress in `A` is tensile and stress in `B` compressive.
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Knowledge Check

  • In the figure shown, A and B are two short steel rods each of cross-sectional area 5 cm^(2) . The lower ends of A and B are welded to a fixed plate CD . The upper end of A is welded to the L -shaped piece EFG , which can slide without friction on upper end of B . A horizontal pull of 1200 N is exerted at G as shown. Neglect the weight of EFG . Longitudinal stress in B is

    A
    tensile in nature and having magnitude `180 N//cm^(2)`
    B
    tensile in nature and having magnitude `240 N//cm^(2)`
    C
    compressive in nature and having magnitude `180 N//cm^(2)`
    D
    compressive in nature and having magnitude `240 N//cm^(2)`

  • In the figure shown, A and B are two short steel rods each of cross-sectional area 5 cm^(2) . The lower ends of A and B are welded to a fixed plate CD . The upper end of A is welded to the L -shaped piece EFG , which can slide without friction on upper end of B . A horizontal pull of 1200 N is exerted at G as shown. Neglect the weight of EFG . Longitudinal stress in A is

    A
    tensile in nature and having magnitude `180 N//m^(2)`
    B
    tensile in nature and having magnitude `240 N//m^(2)`
    C
    compressive in nature and having magnitude `180 N//m^(2)`
    D
    compressive in nature and having magnitude `240 N//m^(2)`

  • Four plates of the same area of cross-section are joined as shown in the figure. The distance each plate is d . The equivalent capacity across A and B will be

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    `(3epsilon_(0)A)/(d)`
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