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A-Level MathematicsYear 2020Q3

11 Turn over Question 3 continued ___________________________________________ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ (Total for Question 3 is 14 marks) 12 4. [In this question, i and j are perpendicular unit vectors in a horizontal plane.] (i + 6j) m s–1 (7i + 2j) m s–1 A B Figure 1 Figure 1 represents the plan view of part of a smooth horizontal floor, where AB represents a fixed smooth vertical wall. A small ball of mass 0.5 kg is moving on the floor when it strikes the wall. Immediately before the impact the velocity of the ball is (7i + 2j) m s–1. Immediately after the impact the velocity of the ball is (i + 6j) m s–1. The coefficient of restitution between the ball and the wall is e. (a) Show that AB is parallel to (2i + 3j). (4) (b) Find the value of e. (5) _ _ _ _ _ _ _ _ _ _ _ _ _ ___________________________________________

Paper Source:9FM0_3C_que_20201021.pdf

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Exam Specification Info

This question is part of the UK A-Level Mathematics syllabus. In the actual exam, structured questions typically require linking specific keywords to gain full marks. Applaa helps you drill these topics.

Syllabus levelAdvanced Level (A-Level)

SubjectMathematics

Official MarksVariable (2–6 marks)

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