在“测定平均速度”的实验中,如图所示:(1)物体运动的路程用______测量.运动时间用______测量,这个

2025-03-16 07:54:29
推荐回答(1个)
回答1:

(1)实验时需要用刻度尺测小车的路程,用秒表测小车的运动时间,本实验依据的原理是v=
s
t

(2)斜面倾角越小,小车运动时间越长,越便于计时;因此实验中为了方便计时,应使斜面的坡度较小;
(3)车运动前半程的平均速度是:v1=
s1
t1
=
50cm
10s
=5cm/s,
后半程的平均速度是:v2=
s2
t2
=
50cm
18s?10s
=6.25cm/s,
整个路程平均速度是:v=
s
t
=
100cm
18s
=5.6cm/s.
故答案为:(1)刻度尺;秒表;(2)小(3)5;6.25;5.6.

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