位能與動能的轉換 - SlideShare

4. 位能當物體的【 位置高低】 或【 形狀】 改變時，此時外力對物體所做的功，轉換成物體另一種形式的能量，稱為【 位能】。

常見的位能有兩種形式： 【 重力】位能、【 ... SlideShareusescookiestoimprovefunctionalityandperformance,andtoprovideyouwithrelevantadvertising.Ifyoucontinuebrowsingthesite,youagreetotheuseofcookiesonthiswebsite.SeeourUserAgreementandPrivacyPolicy. SlideShareusescookiestoimprovefunctionalityandperformance,andtoprovideyouwithrelevantadvertising.Ifyoucontinuebrowsingthesite,youagreetotheuseofcookiesonthiswebsite.SeeourPrivacyPolicyandUserAgreementfordetails. Home Explore Login Signup Successfullyreportedthisslideshow. Activateyour30dayfreetrial tounlockunlimitedreading. 位能與動能的轉換 0 Share Mei-hueiLee • Jun.23,2015 • 0likes • 1,628views DownloadNow Download NextSlideShares Youarereadingapreview. Activateyour30dayfreetrial tocontinuereading. 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常見的位能有兩種形式： 【重力】位能、【彈力】位能。

5. 動手做研究 •軌道上的彈珠從高處落下來，經過平 台發射，水平射程有多遠? 實驗次數起始高度水平距離 1 2 3 6. 請把握時間 只有5分鐘!! 7. 動手做研究 •軌道上不同質量的彈珠從相同高處落下來， 打到大彈珠，彈珠的水平射程有多遠? 實驗次數被大彈珠撞被小彈珠撞 1 2 3 8. 請把握時間 還是只有5分鐘!! 9. 重力位能 •相同條件下，物體的重力位 能和其質量大小成【正】 比，也和其高度變化大小成 【正】比。

913的理化課 10. 重力位能 •公式： 重力位能＝ 質量×重力加速度×高度 U＝m×g×h 單位 11. TestTime1 一個5kg的西瓜放在1m高的桌上, 則西瓜對地板的重力位能大小為 多少？ 49J。

12. TestTime2 500公克的一杯珍奶離地100cm 高時，對地面的重力位能大小為 多少? 4.9J。

13. 搶答題 有A、B、C三物體質量分別為 5kg、2kg、3kg，分別置於地面 上方5m、6m、8m處，則何者 對地面的位能最大？【A】 14. 把懸吊的球拉高， 然後 放手! 913的理化課 15. 把蕭敬騰放到最危險， 但安全的位置! 913的理化課 16. 把蕭敬騰換成你， 站在那個位置! 913的理化課 17. 重力位能與動能的轉換 •位能與動能可互相轉換， 將位能與動能的總和 稱為【力學能】。

913的理化課 18. 重力位能與動能的轉換 •若物體只受【重力】而沒 有其他外力作用時，動能和 位能總和將保持不變，稱為 【力學能守恆】。

913的理化課 19. 自由落體的力學能 913的理化課 20. •單擺的力學能 21. 滑板玩家要如何才能過中央山坡 22. 如果有摩擦力會不會不同? 23. 組合一種軌道，讓滑板玩家玩一玩 24. 彈力位能 物體（彈性體）因形變 而具有作功的能， 稱為【彈力位能】 913的理化課 25. 橡皮筋彈射「紙彈」實驗 913的理化課 實驗次數橡皮筋 拉長長度 紙彈飛行 水平距離 1 2 3 26. 彈簧的力學能守恆 （1）將圓球拉至A點，使其伸長 X距離，彈簧即儲存了彈性位能。

913的理化課 27. 彈簧的力學能守恆 在A點時，形變量 最大， 位能【最大】； 速率為【零】， 動能為【零】。

913的理化課 28. 彈簧的力學能守恆 放手後，圓球受彈 簧的彈力的影響， 向【左】運動。

到B點之前， 動能【】 位能【】 913的理化課 (2) 29. 彈簧的力學能守恆 (3)通過B點時， 位能為【零】； 速度【最大】， 動能【最大】。

913的理化課 30. 彈簧的力學能守恆 (4)彈簧繼續向左 壓縮至－X的距離。

到C點之前， 動能【】 位能【】 913的理化課 31. 彈簧的力學能守恆 （5）到達C點時， 形變量最大， 位能【最大】； 速率為【零】， 動能為【零】 913的理化課 32. 生活中那裡用到 力學能的轉換? 913的理化課 33. 你的彈簧筆 可以彈多高? 913的理化課 Editor'sNotes 探究實驗 探究實驗 探究實驗 如果B點的位能為0 0likes × Bethefirsttolikethis Views × Totalviews 1,628 OnSlideShare 0 FromEmbeds 0 NumberofEmbeds 1 Youhavenowunlockedunlimitedaccessto20M+documents! × UnlimitedReading Learnfasterandsmarterfromtopexperts UnlimitedDownloading Downloadtotakeyourlearningsofflineandonthego YoualsogetfreeaccesstoScribd! Instantaccesstomillionsofebooks,audiobooks,magazines,podcastsandmore. Readandlistenofflinewithanydevice. FreeaccesstopremiumserviceslikeTuneln,Mubiandmore. DiscoverMoreOnScribd × ShareClipboard × Facebook Twitter LinkedIn Link Publicclipboardsfeaturingthisslide × Nopublicclipboardsfoundforthisslide Selectanotherclipboard × Lookslikeyou’veclippedthisslidetoalready. Createaclipboard Youjustclippedyourfirstslide! Clippingisahandywaytocollectimportantslidesyouwanttogobacktolater.Nowcustomizethenameofaclipboardtostoreyourclips. Name* Description Visibility OtherscanseemyClipboard Cancel Save SharethisSlideShare SpecialOffertoSlideShareReaders × TheSlideSharefamilyjustgotbigger.Younowhaveunlimited*accesstobooks,audiobooks,magazines,andmorefromScribd. Activateyourfree60daytrial Cancelanytime.