tolong bantuannya kk , no 16 f 17. soalnya mau dikumpul.please

16. sumbu x
Rx = F1 + F2cos 30+ (-F3)
Rx = 8 + 10.1/2akar3 + (-5)
Rx = 8 + 5akar3 -5 = 8akar3
sumbu y
Ry = F2 sin 30
= 10 sin 30 = 10.1/2 = 5
Jadi Rtotal = akar Rx^2 + Ry^2
= akar (8akar3)^2+5^2
= akar 192+25
= akar 217
= 14,7 N

17. untuk garis grafik dri 5 sekon
Vo = 40
t = 3s
vt = 0
a = (vt-vo)/t = (0-40)/3 = -13,3
S = vo.t + 1/2 at^2
= 40.3 + 1/2(-13,3)(3^2)
= 120 + -595,3
= - 475,3m
untuk gris 10 skon
vt = -20
v0=0
t =1 s
a = (vt-vo)/t = (-20-0)/1 = -20
S = vo.t + 1/2 at^2
= -20.1 + 1/2(-20)(1^2)
= -20 + -10
= -30m

jdi, S = 475,3+30 = 505,3 m