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VYPT Stage 2: Astroblaster

Matthew Lam, Charling Li, Jasjit Manpotra. VYPT Stage 2: Astroblaster. Aim.

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VYPT Stage 2: Astroblaster

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  1. Matthew Lam, Charling Li, Jasjit Manpotra VYPT Stage 2:Astroblaster Perpetual Motion Squad

  2. Aim When a large ball is dropped, with a smaller one stacked on top of it, onto a hard surface the smaller ball will often rise much higher than it would if it was dropped onto the same surface by itself, while the larger ball hardly bounces at all. Our aim was to investigate this phenomenon and design a multiple-ball system, using up to 4 balls, that will reach the greatest elevation of the top ball. Perpetual Motion Squad

  3. Background Perpetual Motion Squad

  4. Hypothesis Perpetual Motion Squad

  5. Experiment Set-up Retort Stand Image source: Erlenmeyer Flasks Foam Balls Nylon Monofilament 1 Kg Weight Image source: Barr & Grosvenor Ltd WD-40 Oil Image source: wd-40.com Perpetual Motion Squad

  6. Calculations • Known Data: • The height the balls are dropped from are at 95 ± 2.5 cm. • The masses of the four balls are: • #1: 0.6 grams; • #2: 1.2 grams; • #3: 2.5 grams; • #4: 4.0 grams. • Assumptions: • Acceleration due to gravity is 9.8 m/s2. • Air resistance is negligible. Note: In this presentation all units of measurement will be in centimetres. Perpetual Motion Squad

  7. Explanation Before impact Perpetual Motion Squad

  8. Explanation On impact Perpetual Motion Squad

  9. Explanation Before impact Perpetual Motion Squad

  10. Procedure Perpetual Motion Squad

  11. Analysis Perpetual Motion Squad

  12. Results • 6 Sets of 2 trials • 4-Ball system (Total mass 8.2 grams, Ratio of masses 6:12:25:40) • Height dropped from: 97.17 cm • Height Reached: 77.86 cm Perpetual Motion Squad

  13. Results • 1, 2 & 3-Ball system (Total mass 4.3 grams, Ratio of masses 6:12:25) • Height dropped from: 94.95 cm • Height Reached: 48.40 cm Perpetual Motion Squad

  14. Results • 1 & 2 -Ball system (Total mass 1.8 grams, Ratio of masses 1:2) • Height dropped from: 94.33 cm • Height Reached: 28.47 cm Perpetual Motion Squad

  15. Considerations Perpetual Motion Squad

  16. Conclusion Perpetual Motion Squad

  17. Bibliography • Astroblaster simulation program • http://www.egtecno.com/applets/177/astroblaster-balls Perpetual Motion Squad

  18. Calculations 4-Ball System (Sample) Note: For these calculations, the coefficient of restitution is assumed to be 1. Perpetual Motion Squad

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