Jawabanmu

2014-02-24T15:25:05+07:00
Mencari jumlah seluruh gaya
W = F * S
1 kj = F * 2 m
1000 J= F* 2m
1000 J / 2m = F
500 N = F
rizal + rizky = 500 N
150 N + rizky = 500 N
rizky = 500 N - 150 N
rizky = 350 N
jadi rizky harus memberikan gaya 350 N
1 5 1
2014-02-24T15:38:37+07:00
W = F x S 1000 = (150+r) x 2 500. = 150 + r r = 350 N