Odpowiedź:
v1=2m/s
v2=8m/s
v3=9m/s
t1=4s
t2=7s
t3=9s
t4=12s
s=v1*t1/2 +v1*(t4-t1)+(v2-v1)*(t2-t1)/2+(v2-v1)*(t4-t2)+(v3-v2)*(t4-t3)/2
s=2m/s*4s/2+2m/s*8s+6m/s*3s/2+6m/s*5s+1m/s*3s/2
s=4m+16m+9m+30m+1,5m
s=60,5m
a1=v1/t1
a1=2m/s/4s
a1=0,5m/s²
a2=(v2-v1)/t2-t1)
a2=6m/s/3s
a2=2m/s²
a3=0
a4=(v3-v2)/(t4-t3)
a4=1m/s/3s
a4=0,33m/s²
Wyjaśnienie:
