1. A car with an initial direction of north moves clockwise one quarter a circle of radius 30 m in 15 s at a constant speed. What is the average velocity? a) 1 m/s north b) 1.41 m/s northeast c) 1.57 m/s southwest d) 2.83 m/s northeast displacement/total time = avg velocity 15pi/15s = pi = 3.14 m/s but none of the answer choice are 3.14 m/s. also how do you find the direction? 2. The velocity of a jet with respect to the ground is 200 m/s at an angle of 30 degrees north of east. The velocity of the jet with respect to the air is 150 m/s at an angle of 60 degrees north of east. What is the velocity of the air with respect to the ground? a) 102 m/s 17 degrees south of east b) 134 m/s 49 degrees south of east c) 134 m/s at 17 degrees north of east d) 203 m/s at 65 degrees north of east e) 112 m/s at 50 degrees north of east I the jets velocity into its components and got vy = 100 and vx = 173. Then with respect to the air vy = 130 vx = 75. Then i took the sqrt of (173 - 130)^2 + (100 - 75) ^ to get 103 m/s but I think im doing something wrong.