A metal rod 6.00 m long is held in a horizontal position. An object with mass 7.

Question

A metal rod 6.00 m long is held in a horizontal position. An object with mass 7.80 kg is suspended from a light rope that is attached 4.00 m from the left-hand end of the rod, as shown in the figure below. Take counterclockwise torques to be positive. For an axis at the right-hand end of the rod, what is the torque exerted on the rod by the tension in the rope?     

A metal rod 6.00 m long is held in a horizontal position. An object with mass 7.80 kg is suspended from a light rope that is attached 4.00 m from the left-hand end of the rod, as shown in the figure below. Take counterclockwise torques to be positive. For an axis at the right-hand end of the rod, what is the torque exerted on the rod by the tension in the rope?

Explanation / Answer

Apply Torque = Force times moment arm

This will pull counter-clockwise, so the torque will be positive

T = (7.8)(9.8)(2)

Torque = 153 Nm

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