Answer:
Explanation:
initial velocity, u = 0 m/s
final velocity, v = 30 m/s
Let the mass is m .
Initial kinetic energy, Ki = 1/2 mu² = 0
Final kinetic energy, Kf = 1/2 mv² = 0.5 m x 30 x 30 = 450 m
Specific energy change = change in kinetic energy per unit mass
= 450 m / m = 450 J/kg = 0.45 kJ/kg
