Question

Bagaimana cara mengerjakan kelajuan rata2
s¹=10km
s²=20km
s³=15km

t¹=5m/s
t²=20m/s
t³=5m/s

Answer 1

S = ( 10 + 20 + 15 ) = 45.000 m
t = 5 + 20 + 5 = 30 s
v = 45.000/30 = 1500 m/s

Answer 2

V (kecepatan/Kelajuan ) = s(jarak) /  t(waktu)

v1 = s1 / t1 = 10/ 5 = 2 km/s

v2= s2 /t2 = 20/20 = 1  km/s

v3= s3/ t3 = 15/5  = 3 km/s

v rata-rata = (2 + 1 + 3) : 3
                   =  6 : 3
                    = 2 km/s