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Answer all questions in the spaces provided. 1 A particle moves along the x‑axis under the action of a force, F newtons, where F = 3x2 + 5 Find the work done by the force as the particle moves from x = 0 metres to x = 2 metres. Circle your answer. [1 mark] 12 J 17 J 18 J 34 J 2 Two particles are moving directly towards each other when they collide. Given that the collision is perfectly elastic, state the value of the coefficient of restitution. Circle your answer. [1 mark] e = –1 e = 0 e = e = 1 3 A stone of mass 0.2 kg is thrown vertically upwards with a speed of 10 m s–1 Find the initial kinetic energy of the stone. Circle your answer. [1 mark] 1 J 5 J 10 J 20 J (02) 4 Reena is skating on an ice rink, which has a horizontal surface. She follows a circular path of radius 5 metres and centre O She completes 10 full revolutions in 1 minute, moving with a constant angular speed of ω radians per second. The mass of Reena is 40 kg 4 (a) Find the value of ω [1 mark] ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ 4 (b) (i) Find the magnitude of the horizontal resultant force acting on Reena. [2 marks] ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ 4 (b) (ii) Show the direction of this horizontal resultant force on the diagram below. [1 mark]
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