May 2025 Pearson Edexcel: GCSE (9–1) Combined Science – ISCO/3H – Paper 3 (Higher Tier) – Merged Question Paper & Mark Scheme

May 2025 Pearson Edexcel: GCSE (9–1) Combined Science – ISCO/3H – Paper 3 (Higher Tier) – Merged Question Paper & Mark Scheme DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA BLANK PAGE 2 ■ ■ ■ ■ Answer ALL questions. Write your answers in the spaces provided. Some questions must be answered with a cross in one of the four boxes . If you change your mind about an answer, put a line through the box and then mark your new answer with a cross . 1 (a) Figure 1 shows the two forces acting on a beach ball as it falls through the air. air resistance weight = 2.5N (Source: © Stepan Bormotov/Shutterstock) Figure 1 The resultant of these two forces is 0.92 N downwards. (i) The mass of the beach ball is 0.25 kg. Calculate the acceleration of the beach ball as it falls. Use the equation F = m × a (3) acceleration = .......................... m / s 2 (ii) Calculate the size of the air resistance force on the beach ball. (1) air resistance = .......................... N ■■■■ 3 Turn over DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA (b) Some students are investigating forces. They use a newton meter to keep a trolley stationary on a sloping runway, as shown in Figure 2. newton meter trolley h runway Figure 2 They measure the force needed to keep the trolley stationary on the sloping runway. (i) They do this at four different places on the runway. When the height, h, of the runway is 0.60 m, their four readings for force are 2.1N 2.7N 2.5N 2.2N Calculate the mean value of these forces. (1) mean force = .......................... N 4 ■■■■ DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA The students then measure values of the force, F, for several different values of h, the height of the runway. Figure 3 is a graph of F against h. 3.5 3.0 2.5 force F in N 2.0 1.5 1.0 0.5 0.0 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 height h in m Figure 3 (ii) Use the graph in Figure 3 to determine the value of F when h = 0.80m. (2) (iii) Determine the gradient of the graph in Figure 3. ■■■■ F = .......................... N (2) gradient = .......................... N/ m (Total for Question 1 = 9 marks) 5 Turn over DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA 2 (a) Figure 4 is a diagram of part of a water wave. direction of travel of the wave 20cm 48cm Figure 4 (i) Use data from Figure 4 to determine the amplitude of the wave. (1) amplitude =...........................cm (ii) Use data from Figure 4 to determine the wavelength of the wave. (1) wavelength =...........................cm (iii) The water wave shown in Figure 4 is generated in a large tank. A student observes the wave. Describe how the student could determine the wave speed of the wave. (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . .. . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . .. . . . . .. . . . . . . . .