WAEC Physics 2020 Objective — Question 25
Question 25 of 50 from the West African Examinations Council (WAEC) Physics 2020 Objective paper, with the correct answer and a full explanation.
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The normal force on the ball is
- A. mg sin(theta)
- B. mg tan(theta)
- C. mg cos(theta)Correct
- D. mg cot(theta)
Explanation
From the free body diagram for the ball on the inclined plank, the normal force N acting perpendicular to the plank's surface is N = mg cos(theta).
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