Calculate the force needed to bring a 913-kg car to rest

Last updated: 7/31/2022

Calculate the force needed to bring a 913-kg car to rest from a speed of 86.0 km/h in a distance of 129 m (a fairly typical distance for a non-panic stop). Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.02 m. Calculate the force exerted on the car and compare it with the force found previously. What is the absolute magnitude of their difference? Give your answer in newtons with 3 significant figures in scientific notation.