AISS 2018 Pure Physics Specially Curated School Paper 2 w Ans Set 1

AHMAD IBRAHIM SECONDARY SCHOOL GCE O-LEVEL PRELIMINARY EXAMINATION 2018 PHYSICS PAPER 2 6091/02 Sec 4 Express Date: 14 August 2018 Duration: 1 h 45 min Name: ………………………………………( ) Class: …………… READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. Write down your name, class and register number on this page and on any additional writing papers. Write in dark blue or black pen. You may use an HB pencil for any diagrams, graphs, tables or rough working. Do not use staples, paper clips, glue or correction fluid. Section A Answer all questions. Section B Answer all questions. Question 12 has a choice of parts to answer. Information for candidates: Candidates are reminded that all quantitative answers should include appropriate units. The use of an approved scientific calculator is expected, where appropriate. Candidates are advised to show all their working in a clear and orderly manner, as more marks are awarded for sound use of Physics than for correct answers. The number of marks is given in brackets [ ] at the end of each question or part question. This question paper consists of 19 printed pages FOR EXAMINER’S USE Section A / 50 Section B / 30 TOTAL / 80

2 Section A Answer all the questions in this section. 1 A rubber ball is dropped freely from a height of 20 m. The ball hits the ground at time t and rebounds vertically upwards with half its maximum velocity. The maximum velocity of the ball just before it hits the ground for the first time is V. (a) In the axes below, sketch the velocity-time graph of the ball from the point of release to the time when it has rebounded to its new maximum height. (Ignore air resistance) [2] (b) Using information from the graph, determine the velocity of the ball just before it hits the ground for the first time. velocity = ………………………………. [2] (c) Find the displacement of the ball after it has rebounded to its maximum height. displacement = ………………………………. [2] (d) State the change in velocity of the ball during its rebound. change in velocity = ………………………………. [1]

3 2 Fig. 2.1 shows three cylinders X, Y and Z are supported by three ropes that passes through ring R. Fig. 2.1 Ring R is in equilibrium under the action of three forces Fx, Fy and Fz. Draw a vector diagram to find Fx and angle . Fx = ………………………………. angle θ = ……………………….. [4] q

4 3 A uniform rod AB of length 3 m weighs 10 N. It is suspended by two identical strings at points X and Y as shown in Fig. 3.1. T1 and T2 are the tension in the strings. Fig. 3.1 Two weights, 20 N and P, are hung from the rod at point A and 1.6 m from X respectively. (a) Draw the weight of the rod in Fig. 3.1 and label it W. Indicate clearly its distance from point A. [1] (b) Determine T2