49 ACTIVITY 7: Accelerated motion (a car moving along the incline PROCEDURE In t

Question

49 ACTIVITY 7: Accelerated motion (a car moving along the incline PROCEDURE In this activity you will look at graphs of the motion of a car when its speed is changing. Delete all recorded Since now we want to o position and velocity graph, locate "all of the Above" by clicking the on the y-axis of the position graph. From here select "all of the Above" to get position, velocity, and to 10 the hold the car at the time and data for the car as it moves away from the detector, stops and and label all the parts of the graph; for example: "going up," at top, and"going down." Describe in words what is happening to the position, velocity and Make a print out acceleration for each part of the graph. 1. How does the distance graph for the car differ from the distance graphs you made when you recorded your steady motion (constant velocity)? 2. What information in your velocity graph shows the direction of motion of the car? 3. What information in your velocity graph shows that the car was slowing down? How would a graph of motion with a constant velocity differ? 4. How does the acceleration vary in time as the car moves up and down the incline? 5. How is the magnitude of the acceleration represented on a velocity-time graph? 6. How is the magnitude of the acceleration represented on an acceleration-time graph?

Explanation / Answer

1. This vary parabolic with time, whereas in steady state distance vary linearly with time(In this case the amount of distance covered per unit time will first decrease and then increase. In other words there will be a curve in this case while in steady state case the graph is straight line.)

2. Sign of the velocity. If the car has positive value of velocity than car is going up and if negative value than car is coming down.

3. Slowing Down: Slope of velocity. (if value is approaching to zero)
Speeding Up: Magnitude of slope of velocity. (if value is going away from zero)
A constant velocity graph will have zero slope and will not change with time. Whereas in this case velocity will change with time.

4. Acceleration will remain constant.

5. By taking slope of that graph.

6. Taking the corresponding value on acceleration representing axis.

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