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28Sep2018

Leaving Certificate Examination 1943 Honours Applied Mathematics

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Question 1

Two ships A and B are 10 miles apart, A being due west of B and steaming due East at 12 miles per hour. B is steaming due North at 18 miles per hour. When will they be nearest one another and what will be their distance apart at that time?

Question 2

A particle slides down a smooth inclined plane 12 feet long in 4 seconds : find its acceleration and the inclination of the plane to the horizontal.

How far from the bottom should a second particle be started on the plane one second after the first had started from the top so that the two particles will reach the bottom together?

Question 3

On a rectangular sheet of iron, 12 inches by 9 inches, marks are made on two adjacent edges at a distance of 3 inches from one corner. These marks are joined by a straight line and the sheet folded down along this line. Find the centre of gravity of the sheet so folded.

Question 4

Describe any method by which the acceleration due to gravity may be determined experimentally. Mention the causes of error likely to affect the result.

Question 5

An object of 18 lb. wt. is placed upon a sheet of glass resting on a horizontal table and a string attached to the object passes horizontally over a pulley at the end of the table. When a weight of 2 lb. is hung on the free end of the string, the object is drawn from rest through a distance of 6 feet in 3 seconds. Find the coefficient of friction between the object and the glass and also the tension in the string.

Question 6

A uniform iron bar AB, 5 ft. long, weighs 10 lb., has a 5 lb. weight fixed to it at a point 1 ft. from A, and is supported by means of cords attached to its ends from a peg C. The cord CA is 3\frac{1}{2} ft. long and the cord CB is 4 ft. long. Find the inclination of the bar to the horizontal in the position of equilibrium and find the tensions in the cords.

Question 7

The height of a lift from the ground t seconds after starting is h feet, given by the following table :-

t123456789101112
h1.64.58.514.422.733.34454.8636972.574

Draw the distance-time graph for the lift. Find the greatest velocity of the lift.

Draw a rough velocity-time graph, and use it to give a short account of the variation in the acceleration throughout the journey.

Question 8

An inverted cone, of angle 60^\circ, has a smooth inside surface and rests with its axis vertical. A smooth particle moves in a horizontal circle on the inside of the cone with a uniform speed of 8 feet per second. Find the distance of the particle from the vertex of the cone.

Question 9

A particle is moving in a straight line with Simple Harmonic Motion. When it is 5 ft. and 12 ft. from the centre of its path, its speed are 24 ft./sec. and 10 ft./sec. respectively. Find the period and the amplitude of the motion. Find also the maximum speed and the maximum acceleration of the particle.

 


Citation:

State Examinations Commission (2018). State Examination Commission. Accessed at: https://www.examinations.ie/?l=en&mc=au&sc=ru

Malone, D and Murray, H. (2016). Archive of Maths State Exams Papers. Accessed at: http://archive.maths.nuim.ie/staff/dmalone/StateExamPapers/

Licence:

“Contains Irish Public Sector Information licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence”.

The EU Directive 2003/98/EC on the re-use of public sector information, its amendment EU Directive 2013/37/EC, its transposed Irish Statutory Instruments S.I. No. 279/2005, S.I No. 103/2008, and S.I. No. 525/2015, and related Circulars issued by the Department of Finance (Circular 32/05), and Department of Public Expenditure and Reform (Circular 16/15 and Circular 12/16).

Note. Circular 12/2016: Licence for Re-Use of Public Sector Information adopts CC-BY as the standard PSI licence, and notes that the open standard licence identified in this Circular supersedes PSI General Licence No: 2005/08/01.

Links:

https://circulars.gov.ie/pdf/circular/per/2016/12.pdf

https://creativecommons.org/licenses/by/4.0/legalcod

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