Particle inside smooth hollow cylinder

A particle moves in a horizontal circle in contact with both the curved inner surface and the base of a fixed smooth hollow cylinder; find forces on the particle from each surface.

6 questions · Standard +0.4

6.05b Circular motion: v=r*omega and a=v^2/r6.05c Horizontal circles: conical pendulum, banked tracks
Sort by: Default | Easiest first | Hardest first
CAIE M2 2007 June Q3
6 marks Standard +0.3
3 \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{57f7ca89-f028-447a-9ac9-55f931201e6b-2_561_597_1585_406} \captionsetup{labelformat=empty} \caption{Fig. 1}
\end{figure} \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{57f7ca89-f028-447a-9ac9-55f931201e6b-2_447_387_1726_1354} \captionsetup{labelformat=empty} \caption{Fig. 2}
\end{figure} A hollow container consists of a smooth circular cylinder of radius 0.5 m , and a smooth hollow cone of semi-vertical angle \(65 ^ { \circ }\) and radius 0.5 m . The container is fixed with its axis vertical and with the cone below the cylinder. A steel ball of weight 1 N moves with constant speed \(2.5 \mathrm {~m} \mathrm {~s} ^ { - 1 }\) in a horizontal circle inside the container. The ball is in contact with both the cylinder and the cone (see Fig. 1). Fig. 2 shows the forces acting on the ball, i.e. its weight and the forces of magnitudes \(R \mathrm {~N}\) and \(S \mathrm {~N}\) exerted by the container at the points of contact. Given that the radius of the ball is negligible compared with the radius of the cylinder, find \(R\) and \(S\).
CAIE M2 2012 June Q3
7 marks Standard +0.3
3 \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{6d3892e0-8c88-44ec-940f-c526d71a7fc6-2_268_652_1599_475} \captionsetup{labelformat=empty} \caption{Fig. 1}
\end{figure} \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{6d3892e0-8c88-44ec-940f-c526d71a7fc6-2_191_323_1653_1347} \captionsetup{labelformat=empty} \caption{Fig. 2}
\end{figure} A small sphere \(S\) of mass \(m \mathrm {~kg}\) is moving inside a smooth hollow bowl whose axis is vertical and whose sloping side is inclined at \(60 ^ { \circ }\) to the horizontal. \(S\) moves with constant speed in a horizontal circle of radius 0.6 m (see Fig. 1). \(S\) is in contact with both the plane base and the sloping side of the bowl (see Fig. 2).
  1. Given that the magnitudes of the forces exerted on \(S\) by the base and sloping side of the bowl are equal, calculate the speed of \(S\).
  2. Given instead that \(S\) is on the point of losing contact with one of the surfaces, find the angular speed of \(S\).
CAIE M2 2012 June Q4
8 marks Standard +0.8
4 \includegraphics[max width=\textwidth, alt={}, center]{98bbefd8-b3dd-49f1-8591-e939282cb05c-2_170_616_1649_767} A small sphere \(S\) of mass \(m \mathrm {~kg}\) is moving inside a fixed smooth hollow cylinder whose axis is vertical. \(S\) moves with constant speed in a horizontal circle of radius 0.4 m and is in contact with both the plane base and the curved surface of the cylinder (see diagram).
  1. Given that the horizontal and vertical forces exerted on \(S\) by the cylinder have equal magnitudes, calculate the speed of \(S\). \(S\) is now attached to the centre of the base of the cylinder by a horizontal light elastic string of natural length 0.25 m and modulus of elasticity 13 N . The sphere \(S\) is set in motion and moves in a horizontal circle with constant angular speed \(\omega \mathrm { rads } ^ { - 1 }\) and is in contact with both the plane base and the curved surface of the cylinder.
  2. It is given that the magnitudes of the horizontal and vertical forces exerted on \(S\) by the cylinder are equal if \(\omega = 8\). Calculate \(m\).
  3. For the value of \(m\) found in part (ii), find the least possible value of \(\omega\) for the motion.
CAIE M2 2013 June Q1
4 marks Standard +0.3
1 A small sphere of mass 0.4 kg moves with constant speed \(1.5 \mathrm {~m} \mathrm {~s} ^ { - 1 }\) in a horizontal circle inside a smooth fixed hollow cylinder of diameter 0.6 m . The axis of the cylinder is vertical, and the sphere is in contact with both the horizontal base and the vertical curved surface of the cylinder.
  1. Calculate the magnitude of the force exerted on the sphere by the vertical curved surface of the cylinder.
  2. Hence show that the magnitude of the total force exerted on the sphere by the cylinder is 5 N .
Edexcel M3 Q1
7 marks Standard +0.3
A motorcyclist rides in a cylindrical well of radius 5 m. He maintains a horizontal circular path at a constant speed of 10 ms\(^{-1}\). The coefficient of friction between the wall and the wheels of the cycle is \(\mu\). \includegraphics{figure_1} Modelling the cyclist and his machine as a particle in contact with the wall, show that he will not slip downwards provided that \(\mu \geq 0.49\). [7 marks]
AQA Further AS Paper 2 Mechanics 2019 June Q4
7 marks Standard +0.3
In this question use \(g = 9.8\,\text{m}\,\text{s}^{-2}\) A ride in a fairground consists of a hollow vertical cylinder of radius 4.6 metres with a horizontal floor. Stephi, who has mass 50 kilograms, stands inside the cylinder with her back against the curved surface. The cylinder begins to rotate about a vertical axis through the centre of the cylinder. When the cylinder is rotating at a constant angular speed of \(\omega\) radians per second, the magnitude of the normal reaction between Stephi and the curved surface is 980 newtons. The floor is lowered and Stephi remains against the curved surface with her feet above the floor, as shown in the diagram. \includegraphics{figure_4}
  1. Explain, with the aid of a force diagram, why the magnitude of the frictional force acting on Stephi is 490 newtons. [2 marks]
  2. Find \(\omega\) [3 marks]
  3. State one modelling assumption that you have used in this question. Explain the effect of this assumption. [2 marks]