Paper Reference(s) 6678/01 Edexcel GCEPapers/A+L… · There are 8 questions in this question...
Transcript of Paper Reference(s) 6678/01 Edexcel GCEPapers/A+L… · There are 8 questions in this question...
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Paper Reference(s)
6678/01Edexcel GCEMechanics M2Advanced/Advanced SubsidiaryTuesday 9 June 2015 – MorningTime: 1 hour 30 minutes
Materials required for examination Items included with question papersMathematical Formulae (Pink) Nil
Candidates may use any calculator allowed by the regulations of the Joint Council for Qualifications. Calculators must not have the facility for symbolic algebra manipulation or symbolic differentiation/integration, or have retrievable mathematical formulae stored in them.
Instructions to CandidatesIn the boxes above, write your centre number, candidate number, your surname, initials and signature. Check that you have the correct question paper. Answer ALL the questions. You must write your answer to each question in the space following the question.Whenever a numerical value of g is required, take g = 9.8 m s–2 and give your answer to either two significant figures or three significant figures.When a calculator is used, the answer should be given to an appropriate degree of accuracy.
Information for CandidatesA booklet ‘Mathematical Formulae and Statistical Tables’ is provided.Full marks may be obtained for answers to ALL questions.The marks for individual questions and the parts of questions are shown in round brackets: e.g. (2).There are 8 questions in this question paper. The total mark for this paper is 75. There are 32 pages in this question paper. Any blank pages are indicated.
Advice to CandidatesYou must ensure that your answers to parts of questions are clearly labelled.You must show sufficient working to make your methods clear to the examiner.Answers without working may not gain full credit.
Paper Reference
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1. A van of mass 900 kg is moving down a straight road that is inclined at an angle to the
horizontal, where sin 1
30. The resistance to motion of the van has constant
magnitude 570 N. The engine of the van is working at a constant rate of 12.5 kW.
At the instant when the van is moving down the road at 5 m s–1, the acceleration of the van is a m s–2.
Find the value of a.(5)
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(Total 5 marks)
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2.
Figure 1
The uniform lamina OABCD, shown in Figure 1, is formed by removing the triangle OAD from the square ABCD with centre O. The square has sides of length 2a.
(a) Show that the centre of mass of OABCD is 29a from O.
(4)
The mass of the lamina is M. A particle of mass kM is attached to the lamina at D to form the system S. The system S is freely suspended from A and hangs in equilibrium
with AO vertical.
(b) Find the value of k.(4)
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2a
2a
AD
C
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Question 2 continued
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(Total 8 marks)
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3. A particle P of mass 0.75 kg is moving with velocity 4i m s–1 when it receives an impulse (6i + 6j)N s. The angle between the velocity of P before the impulse and the
velocity of P after the impulse is °.
Find
(a) the value of ,(5)
(b) the kinetic energy gained by P as a result of the impulse.(3)
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Question 3 continued
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(Total 8 marks)
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4. A ladder AB, of weight W and length 2l, has one end A resting on rough horizontal ground. The other end B rests against a rough vertical wall. The coefficient of friction between the
ladder and the wall is 13
. The coefficient of friction between the ladder and the ground
is . Friction is limiting at both A and B. The ladder is at an angle to the ground,
where 5tan .
3θ = The ladder is modelled as a uniform rod which lies in a vertical plane
perpendicular to the wall.
Find the value of .(9)
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Question 4 continued
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(Total 9 marks)
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5.
Figure 2
A particle P of mass 10 kg is projected from a point A up a line of greatest slope AB of a
fixed rough plane. The plane is inclined at angle to the horizontal, where 5tan
12α =
and AB = 6.5 m, as shown in Figure 2. The coefficient of friction between P and the plane is . The work done against friction as P moves from A to B is 245 J.
(a) Find the value of .(5)
The particle is projected from A with speed 11.5 m s–1. By using the work-energy principle,
(b) find the speed of the particle as it passes through B.(4)
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6.5 m
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(Total 9 marks)
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6. A particle P moves on the positive x-axis. The velocity of P at time t seconds is (2t 2 – 9t + 4) m s–1. When = 0, P is 15 m from the origin O.
Find
(a) the values of t when P is instantaneously at rest,(3)
(b) the acceleration of P when t = 5(3)
(c) the total distance travelled by P in the interval 0 t 5(5)
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(Total 11 marks)
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7.
Figure 3
At time t = 0, a particle is projected from a fixed point O on horizontal ground with speed u m s–1 at an angle ° to the horizontal. The particle moves freely under gravity and passes through the point A when t = 4 s. As it passes through A, the particle is moving upwards at 20° to the horizontal with speed 15 m s–1, as shown in Figure 3.
(a) Find the value of u and the value of .(7)
At the point B on its path the particle is moving downwards at 20° to the horizontal with speed 15 m s–1.
(b) Find the time taken for the particle to move from A to B.(2)
The particle reaches the ground at the point C.
(c) Find the distance OC.(3)
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u m s–1
15 m s–1
A 20°
O C
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(Total 12 marks)
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8. Three identical particles P, Q and R, each of mass m, lie in a straight line on a smooth horizontal plane with Q between P and R. Particles P and Q are projected directly towards each other with speeds 4u and 2u respectively, and at the same time particle R is projected along the line away from Q with speed 3u. The coefficient of restitution between each pair of particles is e. After the collision between P and Q there is a collision between Q and R.
(a) Show that e > 23 (7)
It is given that e = 34
(b) Show that there will not be a further collision between P and Q.(6)
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TOTAL FOR PAPER: 75 MARKSEND
Q8
(Total 13 marks)