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Use one of your three data tables to answer the questions.
Inclination =  2°

(9 points)

1.  Compare the slope of the distance vs. time graph to the average of all your velocity values. Are they close? Why or why not? What does the slope of a distance (or displacement) vs. time graph mean? Explain the answer using your data and include your Distance vs. Time graph and a chart of distance, time, and average velocity.


The slope of the distance vs. time graph is 0.46 and the average of all of the averages is 0.50. Those two values are close. The slope of a time vs. distance formula indicates the average velocity of the ball. The slope formula (y2 – y1)/(x2 – x1) is pretty much same as calculating change in displacement (y2 – y1) over change of time (x2 – x1) and this gives the average velocity. Those two values are close because the trend line indicates how the data points will continue to be and since it is drawn properly it gives an idea of what the velocity the ball will continue to move in.

Distance (m)

Average time (s)

Velocity (m/s)













 Average of the velocities :  0.50 m/s


(9 points)

2.  Describe the line on the velocity-time graph. What was the slope of the velocity vs. time graph? What does the slope of a velocity vs. time graph represent? Explain the answer using your data. In doing so, compare and contrast speed and velocity. Include your velocity-time graph in your answer.


The line on the velocity-time graph was a curved one since the velocity was decreasing as time increased. The slope has a negative value of -0.03. This slope represents the average acceleration of the ball. The slope was negative because the ball was decelerating and coming down to a stop as it approached the  to 2m mark. Velocity and speed are different because speed is just a scalar quantity while velocity is a vector quantity that has magnitude and direction.


 (7 points)

3.  Was the ball moving with uniform motion or did you notice some deceleration or acceleration? From what you have observed, explain what it means for an object to move with uniform motion. How does uniform motion relate to velocity and acceleration?


The ball wasn’t moving with a uniform motion. The calculated average velocity as well the the velocity time graph indicated that the ball was decelerating. For an object to move in a uniform motion it has to have either a constant velocity or a constant acceleration. If the object has a constant velocity then it is moving at zero acceleration and this means moving with out slowing down or speeding up. The object can also be said to have uniform motion if it accelerating at a constant rate. This means the velocity of the object changes by a constant number through out the journey. If the object is to continue moving with a uniform motion then the acceleration must not increase or decrease outside that constant rate.

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