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vector2.gif (563 bytes)

Legend

l 

= distance

t 

= time

v 

= speed/
velocity

Vav

= average
speed

l

= change in
distance

t

= change in
time
v = Change in velocity

Vf

 = final velocity

Vi

 = initial velocity

ti

 = initial time

tf

 = final time

aav

 = average acceleration

d

 = distance

公式
在<加速>那章,我們引伸(推論)出一個很重要的公式:

d = Vit + 1/2 at2
從這個公式,我們又可以引伸出以下的這些公式.

要解出 運動(kinametic)問題,我們常需要結合兩個或更多以下的公式.當我們碰到地心引力問題時,我們通常會假定因為地心引力,<加速>會是 9.8 m/s2

　
平衡速度 constant speed:
v = l/t   or    d/t
平衡加速度 constant acceleration:
d = Vit + 1/2 at2
Vf2 = Vi2 + 2ad
Vf = Vi + at
平均 averages:

Vav =

Formula
Formula for acceleration

　

　

　
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