Kinetic energy is given as,
K.E = 1/2 mv² -----(1)
Data Given:
Mass = m = 1000 kg
Velocity = v = 90 Km/h = (90 ×1000) / (1× 60 × 60) = 25 m/s
Putting values in equation 1,
K.E = 1/2 × 1000 Kg × (25)² m/s
K.E = 1/2 × 1000 Kg × 625 m/s
K.E = 312500 Kg m s⁻¹
Or,
K.E = 312500 J
Or,
K.E = 312.5 kJ
