A 1.5x103 kg truck moving at 15 m/s strikes a 7.5x102 kg automobile stopped at a traffic light. The vehicles hook bumpers and skid together. What is the decrease in kinetic energy

Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of  electromagnetic  energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.

That would be kinetic energy