Tolong bantu no 1-3 pakai cara ya makasihh:))

1.Vo = 90 km/jam
= 90 x 10/36
= 25 m/s
Vt. = 17 m/s
t = 4 s
a = Vt- Vo/t
= 17 m/s - 25 m/s : 4 s
= -8 m/s : 4 s
= - 2 m/s2

2. Vo = 0 m/s
Vt =5 m/s
t = 6 s
m = 150 kg
a = Vt- Vo/t
= 5-0/6
= 5:6
=0,833 m/s2
F = m x a
= 150 kg x 0,833 m/s2
= 125 N
3.m = 300 kg
sigma F = A + B
= 200 N + 400 N
= 600 N
a = Sigma F/m
= 600 N : 300 N
= 2 m/s2