WAEC Physics 2018 Objective — Question 33

Question 33 of 50 from the West African Examinations Council (WAEC) Physics 2018 Objective paper, with the correct answer and a full explanation.

In the diagram illustrated above, a block of mass M is at rest on a plane inclined at angle θ to the horizontal. As θ increases, the velocity ratio of the plane

A. increases
B. decreasesCorrect
C. remains the same
D. decreases and later increases

Explanation

Velocity ratio of an inclined plane = 1/sinθ. As θ increases, sinθ increases, so the velocity ratio decreases.

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