\begin{table}
\centering
\begin{tblr}{
  width = \linewidth,
  colspec = {Q[62]Q[150]Q[200]Q[67]Q[77]Q[52]Q[137]Q[185]},
  cell{1}{4} = {c=3}{0.196\linewidth},
  cell{2}{1} = {r=9}{},
  cell{2}{2} = {r=9}{},
  cell{11}{1} = {r=8}{},
  cell{11}{2} = {r=8}{},
  vline{1-5,8-9} = {1}{},
  vline{1-4,7-9} = {2,11}{},
  vline{4,7-9} = {3-10,12-18}{},
  hline{1-2,11,19} = {-}{},
}
\textbf{Trial No} & {\textbf{Distance between knife }\\\textbf{and weight hanger}\\\textbf{~(Pivot point) P (cm)}} & \textbf{Load/Mass Suspended, M (grams)} & \textbf{~ ~ ~ ~ Scale reading~ } &                             &                        & {\textbf{~ ~ ~ Elevation e = }\\\textbf{y₁ - y₀)q/2D (x 10⁻⁵ m)}} & {\textbf{~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~Y = }\\\textbf{3MgPl²D/bd³q(y₁ - y₀) (x 10¹¹ Pa)}} \\
1                 & 10                                                                                             &                                         & \textbf{\textit{Loading}}        & \textbf{\textit{Unloading}} & \textbf{\textit{Mean}} &                                                                   &                                                                                    \\
                  &                                                                                                & W₀                                      & 47.1                             & 47                          & 47.05                  &                                                                   &                                                                                    \\
                  &                                                                                                & W₀ + M                                  & 47.3                             & 47.2                        & 47.25                  & 4                                                                 & 1.740025028                                                                        \\
                  &                                                                                                & W₀ + 2M                                 & 47.5                             & 47.4                        & 47.45                  & 8                                                                 & 1.740025028                                                                        \\
                  &                                                                                                & W₀ + 3M                                 & 47.7                             & 47.6                        & 47.65                  & 12                                                                & 1.740025028                                                                        \\
                  &                                                                                                & W₀ + 4M                                 & 47.8                             & 47.8                        & 47.8                   & 15                                                                & 2.32003337                                                                         \\
                  &                                                                                                & W₀ + 5M                                 & 48                               & 47.9                        & 47.95                  & 18                                                                & 2.32003337                                                                         \\
                  &                                                                                                & W₀ + 6M                                 & 48.2                             & 48.2                        & 48.2                   & 23                                                                & 1.392020022                                                                        \\
                  &                                                                                                & W₀ + 7M                                 & 48.4                             & 48.4                        & 48.4                   & 27                                                                & 1.740025028                                                                        \\
2                 & 15                                                                                             & W₀                                      & 47.1                             & 47                          & 47.05                  &                                                                   &                                                                                    \\
                  &                                                                                                & W₀ + M                                  & 47.4                             & 47.3                        & 47.35                  & 6                                                                 & 1.740025028                                                                        \\
                  &                                                                                                & W₀ + 2M                                 & 47.7                             & 47.5                        & 47.6                   & 11                                                                & 2.088030033                                                                        \\
                  &                                                                                                & W₀ + 3M                                 & 47.9                             & 47.8                        & 47.85                  & 16                                                                & 2.088030033                                                                        \\
                  &                                                                                                & W₀ + 4M                                 & 48.2                             & 48.1                        & 48.15                  & 22                                                                & 1.740025028                                                                        \\
                  &                                                                                                & W₀ + 5M                                 & 48.5                             & 48.4                        & 48.45                  & 28                                                                & 1.740025028                                                                        \\
                  &                                                                                                & W₀ + 6M                                 & 48.8                             & 48.7                        & 48.75                  & 34                                                                & 1.740025028                                                                        \\
                  &                                                                                                & W₀ + 7M                                 & 49                               & 49                          & 49                     & 39                                                                & 2.088030033                                                                        
\end{tblr}
\end{table} improve this table