Edexcel M1 2024 October — Question 6

Exam BoardEdexcel
ModuleM1 (Mechanics 1)
Year2024
SessionOctober
PaperDownload PDF ↗
TopicMotion on a slope
TypeEquilibrium on slope with horizontal force
DifficultyStandard +0.3 This is a standard M1 mechanics question on forces on a slope with friction. Part (a) requires resolving forces in two directions and applying friction laws (F ≤ μR), while part (b) uses constant acceleration equations. The tan α = 3/4 setup is routine, and both parts follow textbook methods with no novel insight required. Slightly easier than average due to straightforward application of standard techniques.
Spec3.03u Static equilibrium: on rough surfaces3.03v Motion on rough surface: including inclined planes

6. \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{2f2f89a6-cec4-444d-95d9-0112887d87eb-18_335_682_296_696} \captionsetup{labelformat=empty} \caption{Figure 4}
\end{figure} A particle \(P\) of mass 5 kg lies on the surface of a rough plane.
The plane is inclined at an angle \(\alpha\) to the horizontal, where \(\tan \alpha = \frac { 3 } { 4 }\) The particle is held in equilibrium by a horizontal force of magnitude \(H\) newtons, as shown in Figure 4. The horizontal force acts in a vertical plane containing a line of greatest slope of the inclined plane. The coefficient of friction between the particle and the plane is \(\frac { 1 } { 4 }\)
  1. Find the smallest possible value of \(H\). The horizontal force is now removed, and \(P\) starts to slide down the slope.
    In the first \(T\) seconds after \(P\) is released from rest, \(P\) slides 1.5 m down the slope.
  2. Find the value of \(T\).

6.

\begin{figure}[h]
\begin{center}
  \includegraphics[alt={},max width=\textwidth]{2f2f89a6-cec4-444d-95d9-0112887d87eb-18_335_682_296_696}
\captionsetup{labelformat=empty}
\caption{Figure 4}
\end{center}
\end{figure}

A particle $P$ of mass 5 kg lies on the surface of a rough plane.\\
The plane is inclined at an angle $\alpha$ to the horizontal, where $\tan \alpha = \frac { 3 } { 4 }$\\
The particle is held in equilibrium by a horizontal force of magnitude $H$ newtons, as shown in Figure 4.

The horizontal force acts in a vertical plane containing a line of greatest slope of the inclined plane.

The coefficient of friction between the particle and the plane is $\frac { 1 } { 4 }$
\begin{enumerate}[label=(\alph*)]
\item Find the smallest possible value of $H$.

The horizontal force is now removed, and $P$ starts to slide down the slope.\\
In the first $T$ seconds after $P$ is released from rest, $P$ slides 1.5 m down the slope.
\item Find the value of $T$.
\end{enumerate}

\hfill \mbox{\textit{Edexcel M1 2024 Q6}}