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vt =Vo +at
15 =20 +a.10
10 a = -5
a = -0,5 m/s²
Terus cari waktu total nya
Sampei berhenti
Vt nya = 0
vt =Vo +at
0 =20 -0,5.t
0,5 t =20
t = 40 sekon
Terus cari jarak sampei berhenti
S= Vo. t + ½at ²
S = 20*40 + ½*(-0,5)* 40²
S = 800 - ½.½.1600
S= 800 - 400 = 400 m
vt =Vo +at
15 =20 +a.10
10 a = -5
a = -0,5 m/s²
Dari soal
Vt = 0
vt =Vo +at
0 =20 - 0,5 t
0,5 t =20
t = 40 sekon
S= Vo t + 1/2 at^2
S = 20 x 40 + ½ x (-0,5) x 40^2
S = 800 - ( 1/4 x 1600 )
S= 800 - 400 = 400 m