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WAEC Physics 2016 Theory — Question 1

Question 1 of 12 from the West African Examinations Council (WAEC) Physics 2016 Theory paper, with the correct answer and a full explanation.

PART I 1. State the dimensions of: (a) impulse; (b) acceleration; (c) work.

Model answer

(i) Impulse = mass × Δvelocity = mass × displacement/time = M×LT⁻¹ = MLT⁻¹ (ii) Acceleration = velocity/time = (displacement/time)/time = L/T × 1/T = LT⁻² (iii) Work = Force × distance = Mass×Acceleration×distance = ML T⁻² × L = ML²T⁻²

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