Usahakan Jawab semuanya dengan cara

18. dit V0 = 10 m/s
m =500 kg
s =25 m

perlambatan Vt =0.t =s/v =25/10 =2.5 s
a = Vt =V0/t =0 -10/2.5
=-4 (dibalik jdi 4)
maka F = m x a = 500×4 = 2000N

19. m =0.6 kg
R =1.5 m
F =40 N

jwb
F = m x V2 /R
40 = 0.6 x V2 /1.5
40 =0.4 V2
100 =V2
V = 10 m /s

no 17 maaf sya tdk tau