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26 September, 07:42

A built-in-end cantilever support is replaced with what reaction force (s) when a free body diagram is being drawn.

A.) A reaction force in the X axis

B.) A moment force

C.) All of these

D.) None of these

E.) A reaction force in the Y axis

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Answers (1)
  1. 26 September, 09:58
    0
    Option B and E

    A moment force

    Reaction in the Y axis

    Explanation:

    A built-in-end cantilever support is one which has one end fixed into a wall. This makes it rigid and immovable in the x direction.

    Cantilevers are usually loaded in the y-direction, and this usually sets up the following:

    1. Rotation reactions: This is because the load is applied a distance away from the support, in a direction that is perpendicular to the length of the beam. This sets up a rotational force on the beam. and consequently, a rotational reaction at the support (A moment force)

    2. Reaction forces in the Y axis: The mere fact that it is usually loaded in the y - axis, by Newton's third law, there will always be reaction forces set up in the y - direction at the support.

    Note: No reactions in the x axis are set up here, because loading on built-in-end cantilever support is usually vertical.

    Hence, option B and E are correct.
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