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WAEC Physics 2023 Paper

Question : 23

Total: 50

Solution:

Concept:

Distance on a velocity-time graph is equal to the area under the graph between the two points.

Explanation:

From the graph, points X and Y lie on the horizontal rectangular section at constant velocity.

The constant velocity is

40\,m/s

The time interval between X and Y is from

t = 4\,s

t = 8\,s

So, time taken is:

8\,s - 4\,s = 4\,s

Distance is the area of the rectangle:

\text{Distance} = \text{velocity} \times \text{time}

\text{Distance} = 40 \times 4

\text{Distance} = 160\,m

Answer:

Option B:

160.0\,m

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