Answer :
Answer:
Simple Response The first part of the graph is a straight diagonal line and the second part of the graph is a straight horizontal line. The slope of the first part of the graph is positive, indicating that the cart increased in speed, and was therefore accelerating for the first four seconds. After the fourth second, the slope of the line is zero, indicating that the cart moved at a constant speed and did not accelerate any more because the fan was turned off.
Explanation:
The graph of the trial when the fan is turned off is a linear graph.
The slope of the graph changes from positive to negative, and then it becomes 0.
When the fan is running
During the interval when the fan is on and running;
- The function can be represented using a linear function
- The slope of the graph will be positive
This means that, the line of the function will be a straight line with a positive slope
When the fan is off
During the interval when the fan is off;
- The slope of the graph will be first become negative; this implies that the speed of the fan is getting reduced.
- Then the slope will become 0, when the fan finally stops.
From the attached graph:
(a) represents when the fan is on and running
(b) represents when the fan is turned off (but still running)
(c) represents when the fan stops
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