So after t seconds, it will increase by 0.5xm/s.
Start to rest, that is, t=0, v=0.
So v = 0.5t
V> VI
0.5t & gt VI
t & gt 12
So after 12 seconds, it exceeds 6 m/s.
v & lt=8.5
0.5t & lt=8.5
t & lt= 17
So it will not exceed 8.5 m/s in 17 seconds.
About 2023 Work Summary 1
First, strengthen leadership.
According to the unified deployment of superiors, our bureau attaches great importance to fire safety