1.v=5/3(km/h) v=5/3(km/h)
2.t=6/2=3(s) s=v*t=10*3=30(m)
1m/s=3.6km/h
1km/h=5/18m/s
180km/h=50m/s
216km/h=60m/s
25m/s=90km/h
3.设这个角为x
(90-x)=(1/3)*(180-x)
x=45度
1.v=5/3(km/h) v=5/3(km/h)
2.t=6/2=3(s) s=v*t=10*3=30(m)
1m/s=3.6km/h
1km/h=5/18m/s
180km/h=50m/s
216km/h=60m/s
25m/s=90km/h
3.设这个角为x
(90-x)=(1/3)*(180-x)
x=45度