Question

This distance-time graph shows part of the

journey of a bee travelling away from its hive.
Calculate the average speed of the bee for this
part of the journey.
If your answer is a decimal, give it to 1 d.p.
Distance from hive (m)
90
80
70
60
50
40
30
20
10
0
-2
6
8
10

Answer 1

7 m/s

Explanation:

You want the average speed of the bee for the portion of a journey shown in the graph.

Average speed

The average speed is the ratio of distance to time for the journey of interest. Here, the bee travels from 20 m to 90 m away from the hive, for a distance of (90 -20) = 70 m.

The graph covers a time period from 0 seconds to 10 seconds, a period of 10 seconds.

The bee's speed is then ...

s = d/t = (70 m)/(10 s) = 7 m/s

The average speed for the bee is 7 m/s.

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