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 \(\frac { 1 } { 4 }\)
- 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. - Find the value of \(T\).