Q. A baseball pitcher can throw a ball with a speed of 50 m/s. He is in the back of a pickup truck that is driving away from you. He throws the ball in your direction, and it floats toward you at a lazy 20 m/s. What is the speed of the truck?
Q. Two forces, and act at a point. The magnitude of is 9.80, and its direction is an angle 57.0 above the x-axis in the second quadrant. The magnitude of is 6.2, and its direction is an angle 52.7 below the x-axis in third quadrant.