Tolong bantu nooo 3&4....... yaaaa

3) Dik : s = 10m + 5m + 10m
=25m
F = 20N
Dit : w =....?
jwb: w = F x s
= 20N x 25m
=500Nm
= 500J
4) CD = 4²+3²
=16m+9m
= 25m
w = 450J = 450Nm
F = w/s
= 450Nm/25m
= 18N