Which one has larger kinetic energy: a 500-kg object moving at 40 m/s or a 1000-kg object moving at 20 m/s?

Kinetic energy is energy possess by an object due to it motion.

Mass 1; m = 500 Kg Velocity 1; V = 40 m/s

Mass 2; m = 1000 Kg Velocity 2; V = 20 m/s

Formula: K. E = 1/2mv²

For Mass 1 K. E = 1/2 (500 Kg) (40 m/s) ² = 400, 000 J

For Mass 2 K. E = 1/2 (1000 Kg) (20 m/s) ² = 200,000 J

This solution shows that a larger velocity will have a greater kinetic energy.