A boy jump and his feet are 0.5m above the ground.
(a) find the hang-time of the boy
(b) find the jumping speed of the boy.
physica-free fall question
2007-10-27 9:32 pm
回答 (1)
2007-10-27 10:27 pm
✔ 最佳答案
V=0U=X
A=-10ms-2
S=0.5m
T=?
要計b先。
b) V^2=U^2+2as
0=U^2=2(-10)(0.5)
10=u^2
U=-3.16
a)
v=u+at
0=-3.16+-10t
t=0.136ms-1
參考: me
收錄日期: 2021-04-13 14:11:46
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071027000051KK01976