An advertisement claims that a particular automobile can "stop on a dime". What net force would actually be necessary to stop an automobile of mass 850Kg traveling initially at a speed of 43.0 km/h in a distance equal to the diameter of a dime, which is 1.8cm ?

Answer 1

The "work against friction", F * X, would have to equal the initial kinetic evergy, (1/2) M V^2.

F = M V^2/(2 X)

Convert 43.0 km/h to ____m/s, X to 0.018 m, and solve for F in Newtons.

(1 Newton = 0.2248 pounds of force)

Answer 2

3493065

Answer 3

281916.7N