Table 1 - Physics 400

Trials

Distance (cm)

Time (s)

Average Speed (cm/s)

1

100.0 cm (first section) 1.01 99.0

2

100.0 cm (second section) 1.12 89.3

3

100.0 cm (third section) 1.27 78.7

4

400.0 cm (entire section)

2.97

134.68

Questions:

1. Use your data from Table 1 to calculate (to the nearest tenth of a cm/s) the average speed of the ball for each trial. Record your answers in Table 1. Be sure to include Table 1 when you submit this assessment.

2. Why are the speed values in Table 1 called "average" instead of "instantaneous"?

Because instantaneous would be at any given moment and average is the average of the total distance.

3. a. Study your data from Table 1. According to your data from Trials 1, 2, and 3, what happens to the average speed of the rolling superball as it moves from one 100.0 cm segment to the next 100.0 cm segment?

The average speed decreases the further it travels.

b. What do you think might be causing what you observe about the speed of the Superball as it moves from one 100.0 cm segment to the next 100.0 cm segment?

Friction might have been causing the ball to slow dow

4. One meter is equal to 100.0 cm (1 m = 100 cm). Use your data from Trial 4 to calculate the average speed of the rolling superball in m/s (meters per second).

1m=100cm 400cm=2.97s

400cm=2.97s

(4m)/4=(2.97s)/4

1m=.7425s

1.3468m/s