The figure shows a velocity-time graph of a particle moving along a straight line. The total distance travelled by the particle is
A
68 m
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B
52 m
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C
zero
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D
37 m
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Solution
The correct option is C 68 m We know that the area under the velocity time graph gives us the displacement. To calculate the distance we simply add the area which is below the x-axis instead of subtracting it. From the figure we get the areas as (12×2×10)+(3×10)+(12×13×10)+(12×23×20)+(12×2×20)≈68