bantu pakai caranya
Diketahui =
m = 4 Kg
V1 = 4 m/s
V2 =5 m/s
Ditanyakan = Usaha ??
Jawab =
[tex]\displaystyle W = \Delta EK\\\\W = \frac{1}{2}\times m \times (V2^2 - V1^2)\\\\W = \frac{1}{2}\times 4 \times (5^2 - 4^2)\\\\W = \frac{1}{2}\times 4 \times (25-16)\\\\W = \frac{1}{2}\times 4 \times 9\\\\W = 18 \text{ Joule}[/tex]
Jadi , usahanya adalah 18 Joule
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