(1)根据h=
1
2 gt 2 解得:t=
2h
g =0.4s
(2)v=
x
t =
5
0.4 =12.5m/s
答:(1)摩托在空中运动的时间为0.4s;
(2)骑摩托车匀速行驶时的速度为12.5m/s.