Match the quantity with the appropriate units

(a) spring stiffness, \(k\)

(i) \(\quad \mathrm{N} \cdot \mathrm{m}\)

(b) torsional stiffness, \(k_{t}\)

(ii) \(\mathrm{rad}\)

(c) damping coefficient, \(c\)

(e) torsional damping coefficient, \(c_{t}\)

(f) potential energy, \(V\)

(iii) \(\mathrm{N} \cdot \mathrm{m} / \mathrm{rad}\)

(g) power delivered by external force, \(P\)

(iv) \(\mathrm{N} \cdot \mathrm{m} / \mathrm{s}\)

(h) moment of inertia, \(I\)

(i) angular displacement \(\theta\)

(v) \(\mathrm{kg} \cdot \mathrm{m}^{2}\)

(vi) \(\quad \mathrm{N} / \mathrm{m}\)

(vii) \(\mathrm{N} \cdot \mathrm{m} \cdot \mathrm{s} / \mathrm{rad}\)

(viii) \(\mathrm{N} \cdot \mathrm{s} / \mathrm{m}\)