A 540-Kg Boat, Originally at Rest, Is Placed Perpendicular to a Dock

Multiple Choice

A 540-kg boat, originally at rest, is placed perpendicular to a dock so that the front of the boat touches the dock. A 60-kg boy jumps horizontally at 4.0 m/s from the dock to the front of the boat. The speed of the boat just after the boy jumps in is

A) 0.40 m/s.
B) 0.44 m/s.
C) 1.0 m/s.
D) 4.0 m/s.
E) 4.4 m.