Tolong dibantu no 2 dan 3 Dengan jawaban dan cara yang tepat!!!!
Zuhh
Nomor 2 : Rute AB : jarak = 100 km t = 09.30 - 08.00 = 1 jam 30 menit = 1,5 jam Rute BC : S = 150 km t = 11.00-09.00 = 2 jam Rute CD : S = 120 km t = 14.30 - 12.00 = 2,5 jam dit : V rata2 A-D ?
Rute AB :
jarak = 100 km
t = 09.30 - 08.00 = 1 jam 30 menit = 1,5 jam
Rute BC :
S = 150 km
t = 11.00-09.00 = 2 jam
Rute CD :
S = 120 km
t = 14.30 - 12.00 = 2,5 jam
dit : V rata2 A-D ?
dijwab :
V = (S1+S2+S3)/(t1+t2+t3)
= (100+150+120)/(1,5 + 2 + 2,5)
= 370/6
= 61,67 km/jam
nomor 3 :
DIK :
Vo = 0 m/s
Vt = 100 km/jam
t = 9 s
dit : a ?
dijwab :
Vt = (100x1000)/3.600
= 100.000/3.600
= 27,78 m/s²
a = (Vt-Vo)/t
= (27,78-0)/9
= 3,08 m/s²