Answer:
490,000J
Explanation:
Mass(M)=2450kg
Velocity (V) =72km/h
Converting from km/h to m/s:
(72km)* (1000m) * (1h)/(3600s)*(1km)(1h)
Km and h cancel out:
V= 20m/s
Kinetic energy (Ek)=?
Ek=1/2MV^2
Ek=1/2 * (2450kg) * (20m/s)^2
Ek=490,000J
