Constant 36313

The truck weighs 4.5 tons and is moving at a constant speed of 72 km/h. How big is his kinetic energy?

Correct answer:

W =  900 kJ

Step-by-step explanation:

m=4.5 t kg=4.5 1000  kg=4500 kg v=72 km/h m/s=72:3.6  m/s=20 m/s  W1=21 m v2=21 4500 202=900000 J  W=W1 kJ=W1:1000  kJ=900000:1000  kJ=900 kJ=900 kJ



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