Respuesta :

Stefanisaska

Answer:Ek=673.109 kJ

Explanation:

Use equation for Kinetic energy: Ek=m*V²/2

m=650 kg (mass of roller coaster)

V=20.0Miles/s=20.0*1.609m/s=32.18m/s

Ek=m*V²/2

Ek=650kg*(32.18m/s)²

Ek=(650kg*1053.55m²/s²)/2

Ek=673 108.8 J

Ek=673.109 kJ

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