Marie Curie's Velocity experiment:
Hypothesis:
We are trying to find the interval at which the ball goes fastest on the roller coaster track. I think the ball will go fastest at about 45 cm, where the highest kinetic energy is. I think the fastest speed will be somewhere between 90100 seconds Ms. Jensen, is that right?. I think it will travel the slowest at the first hill (going up). I think the slowest speed will be between 4050 seconds.
Materials:
• Roller coaster track
• Marble (steel)
• Roller coaster stand (screw, washer, stand metal rectangular pole)
• Time recorders
Methods:
Our intervals will be ten apart (5 and 15, 5 and 25, 5 and 35, ect…) up to 75. They will not overlap. There will be two trials for each interval.
Results:
Location of first clamp

Location of second clamp

Total distance traveled

Trial time 1

Trial time 2

Average time

Speed

5 cm

15 cm

10 cm

.1786

.1824

.1805

83.10

5 cm

25 cm

20 cm

.2626

.2613

.2620

76.34

5 cm

35 cm

30 cm

.3316

.3917

.3617

82.94

5 cm

45 cm

40 cm

.3918

.3933

.3926

101.88

5 cm

55 cm

50 cm

.4538

.4521

.4530

110.38

5 cm

65 cm

60 cm

.5121

.5129

.5125

117.07

5 cm

75 cm

70 cm

.5066

.5031

.5050

138.61

Disscussion:
Kinetic Energy and Potential Energy are related to the Velocity (speed) because when the ball is going the fastest, there is higher kinetic energy and lower potential energy. The highest hill had the greatest potential energy because it was going the slowest. Potential energy and Kinetic energy are related because they are the two types of energy that relate to motion.
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