高一物理必修一两道解答题要过程

2025-05-21 04:56:14
推荐回答(1个)
回答(1):

19 v5=v0+at=2+2.5=7.5m/s
v4=v0+at=2+2=4m/s x=v4*t+0.5at^2=4+0.25=4.25m
20 (2)Fac=G/sin37°= Fbc=G/cos37°