WAEC Physics 2022 Objective — Question 45
Question 45 of 50 from the West African Examinations Council (WAEC) Physics 2022 Objective paper, with the correct answer and a full explanation.
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A small object of mass 50g is released from a point A. Determine the velocity of the object when it reaches point B, a vertical distance of 30m below A. [g=10 ms⁻²]
- A. 1.5 ms⁻¹
- B. 6.0 ms⁻¹
- C. 17.3 ms⁻¹
- D. 24.5 ms⁻¹Correct
Explanation
v²=u²+2gh=0+2(10)(30)=600. v=√600=24.5 ms⁻¹.
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