Jawabanmu

2014-01-03T06:35:27+07:00
Diketahui :
m = 50 kg
sudut 30 derajat
v = 3,6 km/jam = 1 m/s
g = 10 m/s^2
ditanya : W?
w = m.g = 50 . 10 = 500 N
Sin 30 = h/s
1/2 = h/s
2h = s
vt^2 = v0^2 + 2.g.h
1^2 = 0 + 2 .10. h
1 = 20 h
h = 1/20 m
s = 1/10 m
F = w.h/s = 500 . h / 2h = 250 N
W = F .s = 250.1/10 = 25 Joule