Answer:
1. 2430 feet
2. 1.8 m/s^2
Explanation:
See the attached worksheet.
A time versus speed graph contains a small treasure of mathematical rewards. The area under the graph is equal to the distance travelled. The slope of the line segments represents acceleration.
For total distance: If we break the graph into three sections (2 triangles and a rectangle) we can calculate the areas for each. Each area is the distance travelled for that segment. As shown on the workseet, the total area is 2430 miles, the distance travelled by the train for this question.
The slope of the line in the first 10 seconds is 1.8 meters/sec^2, the acceleration of the train over that period.