7.

\begin{figure}[h]
\begin{center}
  \includegraphics[alt={},max width=\textwidth]{65e4b254-fb7b-45c2-9702-32f034018193-20_264_698_246_685}
\captionsetup{labelformat=empty}
\caption{Figure 1}
\end{center}
\end{figure}

A wooden crate of mass 20 kg is pulled in a straight line along a rough horizontal floor using a handle attached to the crate.\\
The handle is inclined at an angle $\alpha$ to the floor, as shown in Figure 1, where $\tan \alpha = \frac { 3 } { 4 }$\\
The tension in the handle is 40 N .\\
The coefficient of friction between the crate and the floor is 0.14\\
The crate is modelled as a particle and the handle is modelled as a light rod.\\
Using the model,
\begin{enumerate}[label=(\alph*)]
\item find the acceleration of the crate.

The crate is now pushed along the same floor using the handle. The handle is again inclined at the same angle $\alpha$ to the floor, and the thrust in the handle is 40 N as shown in Figure 2 below.

\begin{figure}[h]
\begin{center}
  \includegraphics[alt={},max width=\textwidth]{65e4b254-fb7b-45c2-9702-32f034018193-20_220_923_1457_571}
\captionsetup{labelformat=empty}
\caption{Figure 2}
\end{center}
\end{figure}
\item Explain briefly why the acceleration of the crate would now be less than the acceleration of the crate found in part (a).
\end{enumerate}

\hfill \mbox{\textit{Edexcel Paper 3 2018 Q7 [8]}}