Question: 7 In this question the unit vectors i and j are directed east and north respectively. A canal narrowboat of mass 9 tonnes is pulled

7 In this question the unit vectors i and j are directed east and north respectively. A canal narrowboat of mass 9 tonnes is pulled by two ropes. The tensions in the ropes are (450i+20j)N and (420i20j)N. The boat experiences a resistance to motion R of magnitude 300 N. (a) Explain what it means to model the boat as a particle. [1] The boat is travelling in a straight line due east. (b) Find the equation of motion of the boat. [2] (c) Find the acceleration of the boat giving your answer as a vector. [1]

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