If a truck weighs 1200 kg and is traveling at 30 m/s, how much kinetic energy does it have?

Answer 1

KE = (1/2) m v^2

KE = (1/2) (1200 kg)(30 m/s)^2

one Joule is equal to 1 kg m² / s²

^{KE = 540,000 J = 540 kJ}