The floor of a railroad flatcar is loaded with loose crates having a coefficient of static friction of 0.480 with the floor. if the train is initially moving at a speed of 61.0 km/h, in how short a distance can the train be stopped at constant acceleration without causing the crates to slide over the floor?

30.50 m

Explanation:

Given

coefficient of friction between railroad and crates

Train initial velocity (u)

To get the shortest distance brakes applied should be order of friction force between crates and railroad floor

using

where v=final velocity

u=initial velocity

a=acceleration or deceleration

s=distance

here v=0 , u=16.94 m/s

s=30.502 m

ok

explanation: