A rural mail carrier leaves the post office and drives 20.0 km in a northerly direction. She then drives in a direction 60.0 south of east for 50.0 km. What is her displacement from the post office? Use the three methods.

A kicked football leaves the ground at an angle 0= 37with a velocity of 30 m/s as shown in figure. Calculate (a) the maximum height, (b) the time of travel before the football hits the ground, and (c) how far away it hits the ground. Assume the ball leaves the foot at ground level, and ignore air resistance and rotation of the ball.