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運動的能量和甚麼有關—溫 故知新篇

九年

班

號 姓名:

PART 1.溫 故~~
我們學過這三個和物體運動過程有關的基本公式: V =

∆X
∆V
,a =
, F = m × a ;其中,
∆t
∆t

V、△X、△t、a、△V、F、m 等,這些,都是和物體運動過程有關的『物理量』(可以測量的性直)。

1.根據上述這些公式,寫出下列這些符號所代表意義的專有名詞:
(1) X:______________
(2) V:______________;△X:______________
(3) a:______________;△V:______________
(4) m:______________
(5) F:作用力,如果同時有 2 個以上的作用力,則 F 是指這些作用力的______________

2. 上述哪些物理量有方向性?(寫代號)
答:________________________________

3. V 和上述哪些物理量一定同方向?(寫代號)
答:________________________________

4. F 和上述哪些物理量一定同方向?(寫代號)
答:________________________________

PART 2.知新~~
我們學過用『v-t 圖』求物體運動過程的的加速度和位移。如右圖示:

速度 ( 公尺 /
秒)

一原本靜止的物體受外力 F 作用而在 t 秒內速度增加為 V,則
V

1.下列兩個物理量請用右圖的符號(V、t 和數字)來表示:

0

t

時間 ( 秒 )

(1)加速度 a = __________
(2)位移△X = __________

2.如果外力 F 和位移△X 相乘,已知: F = m × a ,則
(1)將外力 F 和位移△X 相乘的結果,用 m、V 和數字等符號來表示時,F․△X = __________
(2)證明:

3.新名詞:[教師指導]
(1)功:_______________
(2)動能:_______________

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運動的能量和甚麼有關—溫故知新篇

  • 1. 運動的能量和甚麼有關—溫 故知新篇 九年 班 號 姓名: PART 1.溫 故~~ 我們學過這三個和物體運動過程有關的基本公式: V = ∆X ∆V ,a = , F = m × a ;其中, ∆t ∆t V、△X、△t、a、△V、F、m 等,這些,都是和物體運動過程有關的『物理量』(可以測量的性直)。 1.根據上述這些公式,寫出下列這些符號所代表意義的專有名詞: (1) X:______________ (2) V:______________;△X:______________ (3) a:______________;△V:______________ (4) m:______________ (5) F:作用力,如果同時有 2 個以上的作用力,則 F 是指這些作用力的______________ 2. 上述哪些物理量有方向性?(寫代號) 答:________________________________ 3. V 和上述哪些物理量一定同方向?(寫代號) 答:________________________________ 4. F 和上述哪些物理量一定同方向?(寫代號) 答:________________________________ PART 2.知新~~
  • 2. 我們學過用『v-t 圖』求物體運動過程的的加速度和位移。如右圖示: 速度 ( 公尺 / 秒) 一原本靜止的物體受外力 F 作用而在 t 秒內速度增加為 V,則 V 1.下列兩個物理量請用右圖的符號(V、t 和數字)來表示: 0 t 時間 ( 秒 ) (1)加速度 a = __________ (2)位移△X = __________ 2.如果外力 F 和位移△X 相乘,已知: F = m × a ,則 (1)將外力 F 和位移△X 相乘的結果,用 m、V 和數字等符號來表示時,F․△X = __________ (2)證明: 3.新名詞:[教師指導] (1)功:_______________ (2)動能:_______________