WAEC Physics 2015 Objective — Question 10
Question 10 of 50 from the West African Examinations Council (WAEC) Physics 2015 Objective paper, with the correct answer and a full explanation.
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In a school compound, a girl walks 40 m due east from the laboratory to the staff room to submit her report. Then she turns and walks 30 m due north to her classroom. Determine the magnitude of her displacement from the laboratory.
- A. 10 m
- B. 35 m
- C. 50 mCorrect
- D. 70 m
Explanation
By Pythagoras' theorem, displacement = √(40² + 30²) = √2500 = 50 m.
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