question_answer

In a direct impact, loss in kinetic energy is given by \[\Delta K=\frac{M_{1}^{{}}M_{2}^{{}}}{2(M_{1}^{{}}+M_{2}^{{}})}.(V_{1}^{{}}-V_{2}^{{}})_{{}}^{2}(1-k_{{}}^{2})\] with usual notations (except k). The quantity k will have dimensional formula

A) [\[M_{{}}^{0}L_{{}}^{2}T_{{}}^{-2}\]]                  

B) [\[M_{{}}^{{}}L_{{}}^{{}}T_{{}}^{-1}\]]

C) [\[M_{{}}^{0}L_{{}}^{0}T_{{}}^{0}\]]       

D) [\[M_{{}}^{0}L_{{}}^{{}}T_{{}}^{-1}\]]