2023 SCGS 4 IP EOY Physics P1

SINGAPORE CHINESE GIRLS’ SCHOOL END-OF-YEAR EXAMINATION 2023 YEAR FOUR INTEGRATED PROGRAMME PHYSICS PAPER 1 Multiple Choice Thursday 5 October 2023 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class and index number on the Question Paper and Answer Sheet in the spaces provided. There are forty questions in this paper. Answer all questions. For each question, there are four possible answers, A, B, C, 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. The use of an approved scientific calculator is expected, where appropriate. Take g = 10 ms-2 or 10 Nkg-1 unless specified otherwise. This question paper consists of 24 printed pages. CANDIDATE NAME CLASS REGISTER NUMBER

2 1 A heavy nail is fixed firmly to a wall. It is pulled by a string at 40o to the vertical. The nail does not move. Three forces act on the nail: its weight W, the tension T in the string, the force R exerted by the wall. Which diagram, drawn to scale, represents the three forces? A B W W R R T T pull of string nail 40 ° T W R T W R C D

3 2 The gravitational field strength in space is smaller than on the Earth’s surface. A rocket is used to launch a satellite from the Earth’s surface into space. How are the mass and the weight of the satellite affected as the satellite moves away from the surface of the Earth and into space? A Both the mass and the weight are unaffected. B The mass decreases and the weight decreases. C The mass increases and the weight is unaffected. D The mass is unaffected and the weight decreases. 3 Air is trapped in a cylinder by a piston. The piston is moved inwards so that the volume of the air decreases. piston air with initial volume air with final volume The density of the air in the syringe at the initial volume is 0.0012 g / cm3. What is the density of the air in the syringe at the final volume? A 0.0006 g / cm3 B 0.0012 g / cm3 C 0.0024 g / cm3 D 0.0048 g / cm3

4 4 A car begins to move. It speeds up until it reaches a constant speed. It continues to travel at this constant speed for the rest of the journey. What happens to the acceleration and to the velocity of the car during the journey? A Both the acceleration and the velocity change. B Only the acceleration changes. C Only the velocity changes. D Neither the acceleration nor the velocity changes. 5 Four cars, A, B, C and D, move from rest in a straight line. The cars take the same time to accelerate to a velocity of 60 km h–1. Their velocity–time graphs are shown. Which car reaches a velocity of 60 km h–1 in the shortest displacement? 6 A sprinter takes a time of 11.0 s to run a 100 m race. She first accelerates uniformly from rest, reaching a speed of 10 m s–1. She then runs at a constant speed of 10 m s–1 until the finish line. What is the uniform acceleration of the sprinter for the first part of the race? A 0.5 m s–2 B 0.91 m s–2 C 1.7 m s–2 D 5.0 m s–2 0 0 60 velocity / km h –1 time A B C D

5 7 A parachutist falling at a steady speed opens her parachute. Which row is correct for the direction of the resultant force and for the direction of the acceleration of the parachutist just after her parachute opens? resultant force direction acceleration direction A downwards downwards B downwards upwards C upwards downwards D upwards upwards 8 An aircraft travels at a constant velocity of 90 m s–1 in horizontal flight. The diagram shows the horizontal forces acting on the aircraft. drag The mass of the aircraft is 2000 kg. What is the power produced by the thrust force? A 1.8 × 105 W B 2.2 × 105 W C 1.8 × 106 W D 2.0 × 106 W thrust 2400 N

6 9 A car of mass 750 kg has a horizontal driving force of 2.0 kN acting on it. It has a forward horizontal acceleration of 2.0 m s–2. resistive force driving force What is the resistive force acting horizontally? A 0.50 kN B 1.5 kN C 2.0 kN D 3.5 kN 10 Four table lamps are shown along with the position of the centre of gravity, M, in each case. Which lamp is the most stable? M A M B M C M D

7 11 A horizontal metal bar PQ of length 50.0 cm is hinged at end P. The diagram shows the metal bar viewed from above. Two forces of 16.0 N and 5.0 N are in the horizontal plane and act on end Q, as shown. What is the resultant moment about P due to the two forces? A 1.5 N m B 4.4 N m C 6.5 N m D 9.4 N m 12 Two parallel forces, each of magnitude F, act on a uniform rod of length 5d. By taking moments about the centre of the rod, which diagram shows the positions of the two forces that will produce the largest moment on the rod? B F F 16.0 N 50.0 cm 5.0 N 30 ° Q P F F 2 d 2 d F F C D F F d A

8 13 A fish is swimming 15 m below the surface of a lake, as shown. The density of the water is 1000 kg / m3. Atmospheric pressure is 100 000 Pa. The acceleration of free fall g is 10 m / s2. What is the total pressure on the fish? A 50 000 Pa B 120 000 Pa C 150 000 Pa D 250 000 Pa 14 The diagram shows a mercury manometer. The tube is open to the atmosphere on the right-hand side. The left-hand side is connected to a container containing a gas at pressure P. Atmospheric pressure on its own supports a column of mercury of height 756 mm. What is the pressure of the gas? A 676 mm of mercury B 696 mm of mercury C 816 mm of mercury D 836 mm of mercury 15 m fish 60 mm 80 mm mercury gas at pressure P

9 15 Piston X is pushed into a hydraulic cylinder. Piston X produces a pressure PX in the liquid in the cylinder. The diagram shows the cylinder viewed from above. view from above There are two other pistons, Y and Z, in the cylinder. The pressures on piston Y and Z are PY and PZ. What is the relationship between PX, PY and PZ? A PX = PY + PZ B PX > PZ > PY C PX < PZ < PY D PX = PY = PZ piston Y cylinder piston Z piston X liquid

10 16 Data for three types of electricity generators are shown. input energy / MJ wasted energy / MJ oil 500 300 nuclear 200 160 hydroelectric 10 1.0 Which is the least efficient generator and which is the most efficient? least efficient most efficient A hydroelectric nuclear B hydroelectric oil C nuclear hydroelectric D oil hydroelectric 1