HCI Sample C Paper 1

1 Name: __________________________________ ( ) Class: _____ HWA CHONG INSTITUTION Sample Paper C PHYSICS Paper 1 Level: Secondary Three Duration: 45 mins Do not open this booklet until you are told to do so. INSTRUCTIONS TO CANDIDATES Write your name, class and index number in the spaces provided and shade accordingly on the OMR sheet. There are thirty 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 answer sheet. Read very carefully the instructions on the answer sheet. INFORMATION FOR CANDIDATES Each correct answer will score one mark. A mark will not be deducted for a wro ng answer. Take g to be 10 m s-2 or 10 N kg-1 unless otherwise stated. ___________________________________________________________________ This question paper consists of 12 printed pages, including this page.

2 1. The diagram below shows a micrometer screw gauge used to measure the thickness of 15 sheets of paper. What is the thickness of one sheet of paper? A 0.83 mm B 0.87 mm C 0.90 mm D 0.93 mm 2. Which of the following is the correct expression for the velocity of a wave in terms of  (density of water), g (gravitational acceleration) and d (depth of water)? A gd B d g C gd D g 3. A ticker tape timer is used to investigate the motion of an obje ct. The frequency of the ticker tape timer is set to 25 Hz. A portion of the tape is shown below. What is the time taken between point P and point Q? A 0.020 B 0.040 C 0.32 D 0.36 4. Vector R is the resultant of vectors P and Q. Which of the following shows the correct relationship between P, Q and R? A B C D 11 12 45 0 • • • • • • • • • P Q R P Q R P Q R P Q R P Q

3 5. A man walks 10 m north in 5.0 s, turns east and walks another 10 m for the next 6.0 s. What is the average speed and velocity of the man? Average Speed (m s-1) Velocity (m s-1) A 1.8 1.3 B 1.8 2.6 C 1.8 3.6 D 2.0 2.6 6. The diagram below shows the velocity time graph of a rubber ball after it is dropped off a height. What is happening to the ball at P? A Ball is moving downwards and increasing in speed. B Ball has rebounded off the ground but decreasing in velocity. C Ball has rebounded off the ground and increasing speed. D Ball is in contact with the ground and increasing in speed. 7. A second ball is dropped from the same height 1.0 s after the first ball is released. Assuming air resistance is negligible. Which of the following statements is true? A The two balls dropped with constant speed. B The two balls get further as they descend. C The two balls maintain a same distance as they descend. D The two balls get nearer as they descend. 8. A box is shown resting the in position as shown. What is the maximum number of forces that can possibly act on the box? A 2 B 3 C 4 D 5 velocity time • P weights box pulley

4 9. A man exerts a force of 50 N and is able to kee p a 3.0 kg box moving across a horizontal floor at constant velocity of 2.0 m s -1. Two such boxes are stacked over one another. The man then doubles the applied force on the stack that is at rest on the same floor. Which of the following describes the motion of the stack of boxes? A The box will not move. B The box will move at a constant velocity of 1.0 m s-1. C The box will accelerate at 15 m s-2. D The box will move at a constant acceleration of 17 m s-2. 10. A constant force is applied onto an object which is at rest on a smooth surface as shown in the diagram below. Which of the following gives the correct ratio? Kinetic energies at the end of the 1st second : Kinetic energies at the end of the 2nd second : Kinetic energies at the end of the 3rd second A 1 : 1 : 1 B 1 : 2 : 3 C 1 : 3 : 5 D 1 : 4 : 9 11. Parallel rays of light striking a convex lens meet at a point. Light r ays near the edge of the lens bend more than those passing near the centre. Which of the following statements is true? I the incident angles increase as the light strikes further from the centre. II light rays near the edge bend more as the speed slows down more. III refractive index of lens is lower at the edges than the centre. A I only B II and III only C I and II only D I, II and III only f Smooth surface

5 12. A butterfly is preserved in a glass cube. When viewed from one side, i t seemed to be 0.80 cm from the surface; and when view ed from the opposite side, it seemed to be 1.2 cm from the surface. What is the volume of the glass used to make the cub e if the refractive index of glass is 1.5? (You may neglect the volume of the butterfly) Not to scale A 8.0 cm3 B 9.0 cm3 C 25 cm3 D 27 cm3 13. Which of the following graphs corre ctly show the relationship between the frequency and wavelength of electromagnetic waves? 14. A radar station sends out a pulse of radio wave from the earth to the moon. The signal is reflected off the moon and returns 2.6 s later. What is the distance between the moon and the earth? A 1.9 x 108 m B 3.0 x 108 m C 3.9 x 108 m D 7.8 x 108 m frequency wavelength A frequency wavelength B frequency wavelength C frequency wavelength D 1.2 cm 0.8 cm

6 15. Regardless of the position of the screen, a student was unable to get an image of an object on it when he placed the object between 19 cm to 21 cm from the lens. While trying different combinations of object and screen distances, he managed to form a sharp image on the screen 35 cm away from the lens. Where is the likely position of the object from the lens? A 10 cm B 20 cm C 23 cm D 46 cm 16. A ray of light is incident on a glass surface at an angle to the horizontal. Light will pass through one side and exit through the other side. Through which of the objects will the path of light not likely to deviate? 17. The diagram below shows the displacement-distance graph of a wave that has a frequency of 5 Hz. What is the amplitude and speed of the particle, P , 0.3 s later? Amplitude Speed A zero zero B zero maximum C maximum positive zero D maximum negative maximum horizontal A B C D displacement distance P

7 18. The diagram below shows a photographic snap shot of particles taken at an interval of 0.25 s. During this interval, the wavefront was seen to move from line X to line Y. Distances between points are indicat ed as 5.0 cm and 2.0 cm respectively. What is the frequency of the wave? A 1.6 Hz B 8.0 Hz C 40 Hz D 6.0 GHz 19. Hot metal riveting involves first inserting a red hot rivet through two plates and hammering to deform its body to form a second head. Subsequently the rivet is cooled and the plates are firmly joined together. Which of the following describes the molecular energy as the rivet is cooled? Kinetic Energy Potential Energy A Increase Increase B Increase Decrease C Decrease Increase D Decrease Decrease Heated rivet Hammered and cooled rivet

8 20. A bicycle pump is used to infla te a car tyre. The pressure, volume and temperature of the gas is measured during the inflation. Mary says, “ the pressure is constant and the volume increases because the temperature of the gas increases according to Charles’ law.” John says, “the pressure of the gas decreases and the volume increases according to