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Question
Boojho goes to the football ground to play football. The distance-time graph of his journey from his home to the ground is given in Figure 13.9.
(a) What does the graph between points B and C indicate about the motion of Boojho?
(b) Is the motion between 0 to 4 minutes uniform or nonuniform?
(c) What is his speed between 8 and 12 minutes of his journey?
Solution
(a) Graph between points B and C is a horizontal line that indicates that Boojho is at rest, i.e. his speed is zero.
(b) Motion between 0 to 4 minutes is non-uniform as distance-time graph for this time interval is not a straight line.
(c) Speed of Boojho between 8 and 1 minutes of his journey
= `((225 - 150)"m')/((12 - 8)"min")`
= `75/4`
= 18.75 m/min
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| Distance moved (m) | 0 | 10 | 20 | 30 | 40 | 50 |
| Time (minutes) | 0 | 2 | 4 | 6 | 8 | 10 |
Table B
| Distance moved (m) | 0 | 5 | 10 | 15 | 20 | 25 |
| Time (minutes) | 0 | 1 | 2 | 3 | 4 | 5 |
The graph given in Figure 13.2 is true for
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