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Question
From the displacement – time graph shown given below calculate:
- Average velocity in the first three seconds.
- Displacement from the initial position at the end of 13 s.
- Time after which the body is at the initial position,
- Average velocity after 8 s.
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Solution
(i) In first three seconds
Total displacement = 8m
Total time = 3 s
Average velocity = Total displacement/Total time = 8/3
= 2.67 ms−1
(ii) Displacement from the initial position at the end of 13s = −8m.
(iii) Body is at the initial position after 8s and 17s.
(iv) Average velocity after 8s is zero because, after 8s, displacement is zero.
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