Amotorboat traveling 4 m/s, east encounters a current traveling 3.0 m/s, north. a) what is the resultant velocity of the motorboat? b) if the width of the river is 80 meters wide, then how much time does it take the boat to travel shore to shore? c) what distance downstream does the boat reach the opposite shore?

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.