A container of mass 0.3 kg slides along the ice with a speed of 4 m/s when it reaches a rough section where the coefficient of kinetic friction is 0.8. How long will it take the puck to stop sliding?

Answer 1

a = -.8 g

v = 4 - .8(9.81) t
at v = 0
t = 4/[.8*9.81)