Final answer:
The kinetic energy of the 2,000 kg freight train traveling at 25 m/sec is 625,000 Joules or 625 kJ, calculated using the formula KE = 0.5 × mass × velocity².
Step-by-step explanation:
The kinetic energy (KE) of the freight train can be calculated using the formula for kinetic energy, KE = ½mv², where m is the mass of the object and v is the velocity. In this case, the mass (m) of the freight train is 2,000 kg and the velocity (v) is 25 m/sec. Thus, the kinetic energy of the train is KE = ½(2,000 kg)(25 m/sec)².
Calculating this, we get KE = 0.5 × 2,000 kg × (25 m/sec)² = 0.5 × 2,000 kg × 625 (m²/sec²) = 625,000 Joules or 625 kJ.
So, the kinetic energy of the 2,000 kg freight train traveling at a speed of 25 m/sec is 625 kJ.