在“探究*力和*簧伸長量的關係，並測定*簧的勁度係數”的實驗中，實驗裝置如圖所示．所掛鈎碼的重力相當於對*簧提...

問題詳情：

在“探究*力和*簧伸長量的關係，並測定*簧的勁度係數”的實驗中，實驗裝置如圖所示．所掛鈎碼的重力相當於對*簧提供了向右的恆定拉力．實驗時先測出不掛鈎碼時*簧的自然長度，再將5個鈎碼逐個掛在繩子的下端，每次測出相應的*簧總長度．

(1)有一個同學通過以上實驗測量後把6組數據描點在座標系圖中，請作出F－L圖線．

(2)由此圖線可得出該*簧的原長L0=________ cm，在**限度內的勁度係數k=________ N/m.

(3)試根據該同學以上的實驗情況，幫助他設計一個記錄實驗數據的表格(不必填寫其實驗測得的具體數據)．

(4)該同學實驗時，把*簧水平放置與*簧懸掛放置相比較，

優點在於：________________________________________________________________

缺點在於：________________________________________________________________

【回答】

(1) F－L圖線如圖所示：（最後一個點連線也可以）········································· (2分)

(2) L0＝5 cm········································································································· (2分)

k＝20 N/m···································································································· (2分)

(3) 記錄數據的表格如上表················································································· (2分)

(4) 優點是：可以避免*簧自身重力對實驗的影響．······································· (1分)

缺點是：*簧與桌面及繩子與滑輪間存在的摩擦會造成實驗誤差············ (1分)

知識點：未分類

題型：實驗,探究題