Direction: Use the graph below and answer the questions. (s/w) paads 25 20 15 10 5 0 3 A B 6 9 12 time (s) с 15 1. What line segment is acceleration zero? D 18 2. What line segment is the acceleration increasing? 4. In which time interval is the speed constant? 3. Is there a time where acceleration is decreasing? 5. In which time interval is the acceleration positive?
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Answer:
1The line segment where acceleration is zero is between point A and point B, or from 3 seconds to 6 seconds on the graph.
2.The line segment where acceleration is increasing is from point C to point D, or from 12 seconds to 18 seconds on the graph.
3.The speed is constant between points B and C, or from 6 seconds to 12 seconds on the graph.
4Yes, there are two time intervals where acceleration is decreasing. The first interval is between point B and point C, or from 6 seconds to 12 seconds on the graph. The second interval is between point D and the end of the graph, or from 18 seconds to 25 seconds on the graph.
5.The acceleration is positive in two time intervals. The first interval is between point A and point B, or from 0 seconds to 3 seconds on the graph. The second interval is between point C and point D, or from 12 seconds to 18 seconds on the graph.