A bar $AB$, $4 cm$ in diameter and $4 m$ long is rigidly fixed at its ends. A torque of $12,000 kg$. $cm$ is applied at a

section of the bar, one metre from end $A$.  The fixing couples 

• • 1

    $9000,6000$

  • 2

    $3000,9000$

  • 3

    $6000,9000$

  • 4

    $9000,3000$