m = 1000kg
V = 72km/h = (72*(5/18))m/s = 20m/s
Ek = (1000kg*20m/s*20m/s)/2
Ek = 400000J/2
Ek = 200000J
Ek = 200kJ
Ek = Q
Q = 200kJ
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m = 1000kg
V = 72km/h = (72*(5/18))m/s = 20m/s
Ek = (1000kg*20m/s*20m/s)/2
Ek = 400000J/2
Ek = 200000J
Ek = 200kJ
Ek = Q
Q = 200kJ