Solution: Assume that the acceleration of ship and human are a 1 and a2 respectively, the static friction between human and ship is F, and the resistance of ship to water is F.

F=m2a2

F-f=m 1a 1

f=0. 1(m 1g+m2g)

1/2a 1t^2+ 1/2a2t^2=l

Substitution value a 1 = 0.2m/s 2.

Ship displacement x =1/2a1t 2 = 0.4m.