Jawabanmu

2014-03-11T11:33:44+07:00
M = m kg
V1 = 1,4 m/s
V2 = 3 m/s


W = ΔEK
W = 1/2mv2² - 1/2mv1²
W = 1/2 x m x (3)² - 1/2 x m x (1,4)²
W =  4,5m - 0,98m
W = 3,52m joule

2014-03-11T15:47:09+07:00
m = m kg
V1 = 1,4 m/s
V2 = 3 m/s


W = ΔEK
W = 1/2mv2² - 1/2mv1²
W = 1/2 x m x (3)² - 1/2 x m x (1,4)²
W =  4,5m - 0,98m
W = 3,52m joule