Sec_4_Science_Physics_SA2_2018_North_Vista

2 1 The diagram shows a simple pendulum. It swings between X and Z. What sequence should be timed to measure the period of the pendulum? A X Æ Y C X Æ Z Æ Y B X Æ Z D X Æ Z Æ X 2 The diagram shows a vernier V placed against a scale S. What is the vernier reading? A 5.23cm C 5.36cm B 5.33cm D 5.63cm 3 The graph shows how the distance travelled by a motorcycle changes with time. Which statement is correct? A at P, the motorcycle is decelerating B at Q, the motorcycle has constant acceleration C at R, the motorcycle is slowing down D at S, the motorcycle has constant speed ZX motion S V 0 5 10 5 6 distance time0 P Q R S Y 5018 Sec 4 Science Physics SA2 - North Vista www.KiasuExamPaper.comwww.KiasuExamPaper.com 193

3 4 The wheel of a moving car is driven by the engine. The car is accelerating in the direction shown. In which direction does the frictional force between the wheel and the road surface act? 5 An object with a mass of 15kg on the Earth is taken to Mars. The gravitational field strength on the Earth is 10N/kg and on the Mars is 3.7N/kg. What are the mass and weight of the object on the Mars? mass / kg weight / N A 15 56 B 15 150 C 41 15 D 41 150 6 A chair weighing 50N stands on four legs, each having an area of contact of 0.0020m2. What is the pressure of the chair on the floor? A 6250Pa C 12 500Pa B 10 000Pa D 25 000Pa 7 When a 200N force is applied to a box weighing 400N, the box mo ves 2.0m horizontally in 20s. What is the average power? A 20W C 60W B 400W D 1200W A B D C wheel road surface direction of acceleration of car 2.0m 200N 400N www.KiasuExamPaper.comwww.KiasuExamPaper.com 194

4 8 The diagrams show cross-sections of four solid objects. Which object is the least stable? 9 A student has a large tank of water in which he wants to set up a convection current. Which arrangement would not allow him to do this? A cooling at X C heating at Y B heating at X D heating at Z 10 A solid is heated. Which statement is incorrect? A The average distance between the molecules increases. B The average speed of the molecules increases. C The molecules expand. D The molecules gain energy. 11 It takes 0.20s to generate one complete wave in a ripple tank. The wavelength of each wave produced is 4.0cm. What is the speed of the wave? A 0.80cm/s B 1.3cm/s C 5.0cm/s D 20cm/s water Z X Y A B C D www.KiasuExamPaper.comwww.KiasuExamPaper.com 195

5 12 The diagram shows an object placed in front of a plane mirror. Which diagram shows the correct mirror image of the object as seen in the plane mirror? A B C D 13 A projector has a converging lens that projects an image from the visualiser onto a screen. What type of image is produced? A real, inverted, magnified B real, upright, same size C