14wl_17200_5_de_en Rolling Bearings for Rolling Mill Applications
Rolling Away
description
Transcript of Rolling Away
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Rolling Away
Mrs. Walker’s Second Grade Class
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Does the mass of the ball affect the distance a ball
travels?
Problem
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Hypothesis If we roll 3 different balls down the same
ramp to measure the distance it rolls, then we think the metal ball will go the farthest distance because it has more
mass than the other two.
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4 votes for wooden ball
20 votes for metal ball
0 votes for styrofoam ball
Hypothesis
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Variables
Independent variable: We used different types of balls.
Constant: We used the same ramp for each trial.
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Materials
• Meter Stick • Metal Ball• Wooden Ball• Styrofoam Ball• Balance Scale
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Procedures
1. Place your ramp on the ground.2. Roll the metal ball down the
ramp and record the distance.3. Repeat step 2 two more times
and record the distance. 4. Roll the wooden ball down the
ramp and record the distance.5. Repeat step 4 two more times
and record the distance.6. Roll the styrofoam ball down the
ramp and record the distance. 7. Repeat step 6 two more times
and record the distance.
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Results
To determine the average distance
traveled for each ball, we added the total
distance for all three trials and then
divided the total by three.
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Data: Chart
Trials Metal Ball Wooden Ball
Styrofoam Ball
Trial 1 196 193 81
Trial 2 201 170 104
Trial 3 229 183 196
Average 209 182 127
Distance- Centimeters
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Data: Graph
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Conclusion• In our hypothesis the majority of the class (20 students) predicted
that the metal ball would roll the farthest and they were correct. The 4 students that voted that the wooden ball would go the farthest were incorrect.
• All three balls have the same shape yet their mass is different. The styrofoam ball had the least amount of mass, and the metal ball had the most amount of mass.
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Conclusion
• We concluded that the metal ball went the farthest because its mass was the heaviest out of the three balls.
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Bibliographyhttp://www.discoveryeducation.comThese educational videos define what mass is and how it can be measured.• Comparing Mass• Measuring Mass• Introduction to Mass
http://www.brainpopjr.com/math/measurement/gramsandkilograms/preview.weml This educational video explains how mass can be measured in grams and kilograms.
https://www2.houstonisd.org/Curriculum/SCI2_1213_Unit3_Properties_of_MatterThis website provides resources (videos, books, lessons) regarding mass.