What distance will it slide before coming to a stop?

Question

The kinetic friction force between a 60.0-kg object and a horizontal surface is 50.0 N. If the initial speed of the object is 25.0 m/s, what distance will it slide before coming to a stop?

Answer 1

a = F/mass = 50.0/60.0 = .833 m/sec^2

v0=25.0 m/s; vf=0 so using our "Big 4" equations...

d=1/2 a t^2 +vo t +d0

vf^2 = v0^2 +2ad

vf=vo+at

d=1/2 (vo+vf) t

We get...375 meters for distance (and it takes 30.0 seconds)

-Fred