Hello all! My physics teacher has been absent for about two days so i haven't been able to ask him any questions. Basically I dont understand the concept of relative velocity. I couldnt even start one problem! 1) A Jet airliner moving intially at 300 mph due east enters a region where the wind is blowing at 100 mph in a direction 30.0 degrees north of esast. What is the new velocity of the aircraft relative to the ground? For this question.. im thinking i can draw some vectors to represent the information and just manipulate them to find the resultant vector(?) and would that be the final velocity? You dont have to solve it for me.. would just appreciate a hint to a step in the right direction. 2) A rowboat crosses a river with a velocity of 3.30 mi/h at an angle of 62.5 degrees north of west relative to the water. The river is 0.505 mi wide and carries an eastward current of 1.25 mi/h. How far upstream is the boat when it reaches the opposite shore? My book is very vague in explaining these types of problems! For this problem i drew it out successfully.. but i have no idea how to attack it! if someone could point me in the right direction im positive i could solve it on my own thanks! thanks in advance!! i really appreciate your guys' help it's been a lifesaver.