Later it was discovered that the local scout group visited the supermarket that afternoon to buy food for their camping trip. (f) Comment on the validity of the model used to obtain the answer to part (e), giving a reason for your answer. (1) (Total for Question 5 is 9 marks) ___________________________________________________________________________ TOTAL FOR SECTION A IS 30 MARKS SECTION B: MECHANICS Answer ALL questions. Unless otherwise indicated, whenever a numerical value of is required, take = 9.8 m s–2 g g and give your answer to either 2 significant figures or 3 significant figures. 6. Figure 1 A car moves along a straight horizontal road. At time = 0, the velocity of the car is m s–1. t U The car then accelerates with constant acceleration m s–2 for seconds. The car travels a a T distance metres during these seconds. D T Figure 1 shows the velocity-time graph for the motion of the car for 0 t T. Using the graph, show that = + 2 . D UT aT (No credit will be given for answers which use any of the kinematics (suvat) formulae listed under Mechanics in the AS Mathematics section of the formulae booklet.) (4) (Total for Question 6 is 4 marks)
Later it was discovered that the local scout group visited the supermarket that afternoon to buy food for their camping trip. (f) Comment on the validity of the model used to obtain the answer to part (e), giving a reason for your answer. (1) (Total for Question 5 is 9 marks) ___________________________________________________________________________ TOTAL FOR SECTION A IS 30 MARKS SECTION B: MECHANICS Answer ALL questions. Unless otherwise indicated, whenever a numerical value of g is required, take g = 9.8 m s–2 and give your answer to either 2 significant figures or 3 significant figures. 6. Figure 1 A car moves along a straight horizontal road. At time t = 0, the velocity of the car is U m s–1. The car then accelerates with constant acceleration a m s–2 for T seconds. The car travels a distance D metres during these T seconds. Figure 1 shows the velocity-time graph for the motion of the car for 0 t T. Using the graph, show that D = UT + aT 2 . (No credit will be given for answers which use any of the kinematics (suvat) formulae listed under Mechanics in the AS Mathematics section of the formulae booklet.) (4) (Total for Question 6 is 4 marks)
02a_as_mathematics_sams_-_paper_2_statistics_and_mechanics_lb.docx