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v= 36 km/jam --> 36×1000/3600= 10 m/s
Ek= 50000 Joule
Dit:
m=..?
Penye:
Ek= 1/2.m.v²
1/2.m.v²= Ek
1/2×m×10²= 50000
1/2×m×100= 50000
50×m= 50000
m= 50000/50
m= 1000 kg
Ek = 50.000 J
m = Ek : ( 1/2 × v² )
= 50.000 J : ( 1/2 × 10² m/s )
= 1.000 kg atau 1 ton