The graph below represents the journey of a cyclist - Junior Cycle Science - Question 7 - 2019
Question 7
The graph below represents the journey of a cyclist.
(a) Name an instrument that could be used to measure the time taken for the journey.
(b) Calculate the average... show full transcript
Worked Solution & Example Answer:The graph below represents the journey of a cyclist - Junior Cycle Science - Question 7 - 2019
Step 1
a) Name an instrument that could be used to measure the time taken for the journey.
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Answer
A suitable instrument that could be used to measure the time taken for the journey is a stopwatch or a timer.
Step 2
b) Calculate the average speed of the cyclist as he travelled from point A to point B.
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To calculate the average speed, we use the formula:
v=timedistance
From the graph, the distance travelled from point A to point B is 100 m, and the time taken is 40 s. Thus, the average speed is:
c) Describe the cyclist’s motion between points B and C of his journey.
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Between points B and C, the cyclist was stopped or had a speed of zero. This is indicated by the horizontal line on the graph, which shows no change in distance over time.
Step 4
d) The cyclist’s speed as he travelled from point A to point B was less than his speed as he travelled from point C to point D. What evidence is there in the graph to support this?
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The evidence in the graph that supports this statement is that the line from A to B has a less steep slope, indicating a smaller speed, while the line from C to D is steeper, indicating a greater speed as the distance increases more rapidly over the same time.
Step 5
e) Describe what the cyclist did at point D.
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At point D, the cyclist turned back or returned.
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