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

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

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

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

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

In a direct impact, loss in kinetic energy is given by \[\Delta K=\fra

1.	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.	[\[M_{{}}^{0}L_{{}}^{{}}T_{{}}^{-1}\]]
Answer» D. [\[M_{{}}^{0}L_{{}}^{{}}T_{{}}^{-1}\]]