When you illustrate the problem description, the direction of distance travelled is shown in the picture. But actually, since you are asked of the average velocity, you really don't need the drawing. It is given that the constant speed is 55 km/h. Since distance is speed multiplied with time, then you only have to multiply the constant speed and the respective time so you can find the distance. The average velocity, on the other hand, is the total distance per total time travelled. So since there is a constant speed, all the terms for time will be cancelled. Therefore, the average velocity is the constant speed. But we have to add the direction, which is south so it will denote a negative sign. The final answer for average velocity is -55 km/h.
There are three fundamental forces that act at a distance. They are gravitational, electromagnetic and nuclear forces.
<span>Surface
ocean currents are driven by winds that blow in certain patterns. They are
caused by the Earth’s spin and the Coriolis effect. Evaporation adds water to
the atmosphere. It is the change from liquid to gas wherein liquid molecules
tends to go the gas phase and increases the number of molecules.</span>