1. As time increases, what happens to the speed?
2 What is the speed at 5 seconds?
3. Assuming constant acceleration, what would be the speed at 14 seconds 4.At what time would the object reach a speed of 45 m/s?
5.What is the object's acceleration?
6. What would the shape of the graph be if a speed of 50 m/s is maintained from 10s to 20s?
7. Based on the information in Problem 6, calculate the acceleration from 10s to 20s.
8. What would the shape of the graph be if the speed of the object decreased from 50 m/s at 20s to 30 m/s at 40s?
2 What is the speed at 5 seconds?
3. Assuming constant acceleration, what would be the speed at 14 seconds 4.At what time would the object reach a speed of 45 m/s?
5.What is the object's acceleration?
6. What would the shape of the graph be if a speed of 50 m/s is maintained from 10s to 20s?
7. Based on the information in Problem 6, calculate the acceleration from 10s to 20s.
8. What would the shape of the graph be if the speed of the object decreased from 50 m/s at 20s to 30 m/s at 40s?
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Answer:
1. Speed decreases
2. Speed at 5 seconds is 0 m/s
3. Speed would be -45 m/s (since acceleration is negative, speed would too be negative)
4. Time spent would be 17.9 seconds
5. Acceleration is -2 m/s^2
6.Graph would be a straight line across 50 m/s.
7. It would be -2 m/s^2
8. The shape of this graph would be a downwardly sloped straight line with an acceleration of 2 m/s^2.
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