The tension in the string at the 60-cm mark will be 0.9 N.The tension force is applied along the whole length of the wire, pulling energy equally on both ends.
<h3>What is tension force?</h3>
The tension force is described as the force transferred through a rope, string, or wire as it is pulled by opposing forces.
The given data in the problem is;
The length of the stick is, L= 1.20 m =120 cm
T is the tension in the string at the 60-cm mark;
T₁ is the tension at the 20-cm mark
From the torque equilibrium law;

Hence the tension in the string at the 60-cm mark will be 0.9 N.
To learn more about the tension force refer to the link;
brainly.com/question/2287912
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