Question

The velocity-time graph of a cyclist during a race is given. Find out her total displacement over the course of the race.

• A. 800 m
• B. 1000 m
• C. 600 m
• D. 200 m

Answer 1

The correct option is A 800 m

We know that,
Area under a velocity-time graph = Displacement
Here,
Displacement up to 20 s = ½ × 20 × 20 = 200 m
Displacement between 20 s to 50 s = 20 × 30 = 600 m
Therefore,
Total displacement = (200 + 600) m = 800 m