Q1. An airplane P is heading N 80o W at 240 m/s relative to the air. The wind blows from N 10o E with the speed of 41 m/s relative to the ground. Find the direction and magnitude of the velocity of airplane P relative to the ground.
In the meantime, the velocity of airplane Q relative to the air is 250 m/s in the direction of N 20o W. What is the speed of airplane Q relative to the airplane P?
Q2. A car starts from rest and moves along straight line with an acceleration of a = (3s-1/3) m/s2, where s is in meters. Find out the car's velocity and position when t = 6s.