hal 100 n0 29

diket :
t1 = 0 s
t2 = 20 s
t3 = 60 s
t4 = 80 s
v = 0
v2 = 15
v3 = 15
v4 = o

ditanya : a rata-rata, s

jawab :
a. a rata-rata t1,t2 = 15/20 m/s2 = 3/4 m/s2
a rata-rata t2,t3 = om/s2
a rata-rata t3,t4 = -15/20 m/s2 = -3/4 m/s2

b. s2 = t2kuadrat + v2kuadrat
s = V400+225
s = 25 m

c. s= 40 + V225+400
s = 65 m

melissa amanda x-k 29