11_SMSS 2010 P1_WorkedOutAns

Secondary 4 Express 17th September 2010 Duration : 1 hour Total Marks : 40 READ THESE INSTRUCTIONS FIRST Do not open this Booklet until you are told to do so. Write in soft pencil. Write your name and index number on the answer sheet provided. Do not use staples, paper clips, highlighters, glue or correction fluid. There are forty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C, and D. Choose the one you consider correct and record your choice in soft pencil on the separate answer sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. When necessary, assume the acceleration due to gravity, g to be 10 m/s2. ________________________________________________________________________ This question paper consists of 15 printed pages PHYSICS 5058/01 St. Margaret’s Secondary School Preliminary Examinations 2010 [Turn over

2 1 The dimension of a rectangular block of wood is measure as 130 mm, 4.0 mm and 3.21 mm. What are the measuring instruments used to obtain such readings? (i) metre rule (ii) vernier calipers (iii) micrometer screw gauge A (i) and (ii) only B (i) and (iii) only C (ii) and (iii) only D (i), (ii) and (iii) 2 Given that Newton’s Law of Gravitation is given by 2 21 r mGmF= where m 1 is the mass of particle 1, m 2 is the mass of particle 2, F is the gravitational force, r is the distance between the two particles and G is the universal gravitational constant. Which of the following is the unit for G? A kg3m3s2 B kgs2/m3 C m3/kgs2 D kg3m3/s2 Answer Question 3 and 4 based on the information given below. A stream is 30 m wide and its current flows southward at 1.5 m/s. A toy boat is launched with a velocity of 2.0 m/s eastward from the west bank of the stream. 3 What is the magnitude of the boat’s resultant velocity as it crosses the stream? A 0.5 m/s B 2.1 m/s C 2.5 m/s D 3.5 m/s 4 How far southward will the boat have traveled upon reaching the opposite bank? A 18.0 m B 22.5 m C 30.0 m D 37.5 m

3 5 Two stones, A and B, are thrown horizontally from the top of a cliff. Stone A has an initial speed of 15 m/s and stone B has an initial speed of 30 m/s. There is negligible air resistance. Compared to the time it takes stone A to reach the ground, the time it takes stone B to reach the ground is A half as great. B the same. C twice as great. D four times as great. 6 An object is pulled at a constant speed across a rough surface. Which of the following statements about friction is true? A The magnitude of the frictional force is greater than the driving force. B The magnitude of the frictional force is less than the driving force. C The magnitude of fri