Question

A driver, traveling at 80 km/h, brakes her 2000 kg truck to stop for a red light. How much internal energy is produced?.

Answer 1

Below

Step-by-step explanation:

80 km/hr * 1 hr / 3600 s * 1000 m / km = 22.22 m/s

Energy produced = kinetic energy = 1/2 m v^2 = 1/2 (2000kg) (22.22m/s)^2

= 493827 J