מצגת של PowerPoint - BGUphysics.bgu.ac.il/~irawolf/Presentations/waterpolo.pdf · Water...
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Transcript of מצגת של PowerPoint - BGUphysics.bgu.ac.il/~irawolf/Presentations/waterpolo.pdf · Water...
![Page 1: מצגת של PowerPoint - BGUphysics.bgu.ac.il/~irawolf/Presentations/waterpolo.pdf · Water Copters 𝐹 =𝑚𝑎 𝜕𝑃 𝜕𝑡 =𝑚𝑎 𝜕𝑃 𝜕 =0 𝑃𝑧,𝜒=𝑃𝑧,𝑎𝑖](https://reader031.fdocuments.us/reader031/viewer/2022022705/5bdd64d509d3f2e2568cc6c1/html5/thumbnails/1.jpg)
![Page 2: מצגת של PowerPoint - BGUphysics.bgu.ac.il/~irawolf/Presentations/waterpolo.pdf · Water Copters 𝐹 =𝑚𝑎 𝜕𝑃 𝜕𝑡 =𝑚𝑎 𝜕𝑃 𝜕 =0 𝑃𝑧,𝜒=𝑃𝑧,𝑎𝑖](https://reader031.fdocuments.us/reader031/viewer/2022022705/5bdd64d509d3f2e2568cc6c1/html5/thumbnails/2.jpg)
![Page 3: מצגת של PowerPoint - BGUphysics.bgu.ac.il/~irawolf/Presentations/waterpolo.pdf · Water Copters 𝐹 =𝑚𝑎 𝜕𝑃 𝜕𝑡 =𝑚𝑎 𝜕𝑃 𝜕 =0 𝑃𝑧,𝜒=𝑃𝑧,𝑎𝑖](https://reader031.fdocuments.us/reader031/viewer/2022022705/5bdd64d509d3f2e2568cc6c1/html5/thumbnails/3.jpg)
Water Copters
𝐹 = 𝑚 𝑎𝜕 𝑃
𝜕𝑡= 𝑚 𝑎
𝜕 𝑃
𝜕𝑡=0 ⟹ 𝑃 𝑧,𝜒 = 𝑃 𝑧,𝑎𝑖𝑟
𝑚𝜒𝑔 Δ𝑡 = 𝑚𝑎𝑖𝑟𝑣𝑎𝑖𝑟 = 𝜌𝑎𝑖𝑟𝐴𝜒𝑣𝑎𝑖𝑟 Δ𝑡 𝑣𝑎𝑖𝑟
𝑣𝑎𝑖𝑟2 =
𝑚𝜒𝑔
𝜌𝑎𝑖𝑟𝐴𝜒
![Page 4: מצגת של PowerPoint - BGUphysics.bgu.ac.il/~irawolf/Presentations/waterpolo.pdf · Water Copters 𝐹 =𝑚𝑎 𝜕𝑃 𝜕𝑡 =𝑚𝑎 𝜕𝑃 𝜕 =0 𝑃𝑧,𝜒=𝑃𝑧,𝑎𝑖](https://reader031.fdocuments.us/reader031/viewer/2022022705/5bdd64d509d3f2e2568cc6c1/html5/thumbnails/4.jpg)
Some reference
• 𝑣𝑤𝑎𝑡𝑒𝑟 = 6.5 𝑚𝑠𝑒𝑐 ~ 23 𝑘𝑚
ℎ𝑟
• 5K world record: 12:37.35 -> 𝑣𝑊𝑅 = 6.6 𝑚𝑠𝑒𝑐
• 800m ER: 1:41.91 -> 𝑣𝑊𝑅 = 7.92 𝑚𝑠𝑒𝑐
• 1000m WR: 2:11.96 -> 𝑣𝑊𝑅 = 7.57 𝑚𝑠𝑒𝑐
![Page 5: מצגת של PowerPoint - BGUphysics.bgu.ac.il/~irawolf/Presentations/waterpolo.pdf · Water Copters 𝐹 =𝑚𝑎 𝜕𝑃 𝜕𝑡 =𝑚𝑎 𝜕𝑃 𝜕 =0 𝑃𝑧,𝜒=𝑃𝑧,𝑎𝑖](https://reader031.fdocuments.us/reader031/viewer/2022022705/5bdd64d509d3f2e2568cc6c1/html5/thumbnails/5.jpg)
Water-Polo periods:
• 4 quarter game
• Each quarter = 8 minutes of actual play time.
• Time-outs: 2 minutes, 5 minutes half-time.
• 50-60 minutes of actual in-water time.
![Page 6: מצגת של PowerPoint - BGUphysics.bgu.ac.il/~irawolf/Presentations/waterpolo.pdf · Water Copters 𝐹 =𝑚𝑎 𝜕𝑃 𝜕𝑡 =𝑚𝑎 𝜕𝑃 𝜕 =0 𝑃𝑧,𝜒=𝑃𝑧,𝑎𝑖](https://reader031.fdocuments.us/reader031/viewer/2022022705/5bdd64d509d3f2e2568cc6c1/html5/thumbnails/6.jpg)
How much swimming is involved?
• Water polo swimming
• Swimming = Resting?!!
• At the MOST 30% of time.
![Page 7: מצגת של PowerPoint - BGUphysics.bgu.ac.il/~irawolf/Presentations/waterpolo.pdf · Water Copters 𝐹 =𝑚𝑎 𝜕𝑃 𝜕𝑡 =𝑚𝑎 𝜕𝑃 𝜕 =0 𝑃𝑧,𝜒=𝑃𝑧,𝑎𝑖](https://reader031.fdocuments.us/reader031/viewer/2022022705/5bdd64d509d3f2e2568cc6c1/html5/thumbnails/7.jpg)
Water polo violence
![Page 8: מצגת של PowerPoint - BGUphysics.bgu.ac.il/~irawolf/Presentations/waterpolo.pdf · Water Copters 𝐹 =𝑚𝑎 𝜕𝑃 𝜕𝑡 =𝑚𝑎 𝜕𝑃 𝜕 =0 𝑃𝑧,𝜒=𝑃𝑧,𝑎𝑖](https://reader031.fdocuments.us/reader031/viewer/2022022705/5bdd64d509d3f2e2568cc6c1/html5/thumbnails/8.jpg)