32 a M1 2 M1 for correct function H Fg = b = 6 × 103 m r B1 B1 for calculation of and F1 F2 F1 = F2 = = 0.996 0.996 to 3 dp A1 A1 cao The difference is too small (reference c part b). C1 C1 for correct interpretation of a scale factor close to 1 4 33 M1 2 M1 for recognising and using the ratio of the speeds H The speed of the faster car is 40 mph. C1 C1 for clarity of reasoning and explanation, diagram oe = = T So they meet after 30 minutes. Speeds are in the ratio 1 : 2 = 20 : 40 = 10 : 20 So the cars meet when the slower car has travelled 10 miles and the faster car has travelled 20 miles. It will take half an A1 A1 cao hour for a car travelling at 20 mph to go a distance of 10 miles. 3
32 a b c r = 6 × 103 m F1 = F2 = = 0.996 Fg = 0.996 to 3 dp The difference is too small (reference part b). M1 B1 A1 C1 2 M1 for correct function B1 for calculation of F1 and F2 A1 cao C1 for correct interpretation of a scale factor close to 1 H 4 33 The speed of the faster car is 40 mph. T = = So they meet after 30 minutes. Speeds are in the ratio 1 : 2 = 20 : 40 = 10 : 20 So the cars meet when the slower car has travelled 10 miles and the faster car has travelled 20 miles. It will take half an hour for a car travelling at 20 mph to go a distance of 10 miles. M1 C1 A1 2 M1 for recognising and using the ratio of the speeds C1 for clarity of reasoning and explanation, diagram oe A1 cao H 3
Higher_Skills_Ratio_MarkScheme_Edexcel.docx