Question

URGEEEEENT¡¡¡ If the car was initially traveling at 86 km/h and came to a stop in 5.3 s along a straight, level road, what was the magnitude of the average force applied to the passenger by the seatbelt?

Answer 1

Time is unnecessary.

The work done on a body produces a variation in its kinetic energy.

T = 1/2 m (V² - Vo²); if stop V = 0

T = - 1/2. 8000 kilos (12 m / s) ² = - 576000 J