Refer to the diagram shown below.
Let the truck be traveling north at 20 m/s.
Let the ball be shot eastward at 20 m/s
The resultant velocity of the ball is
v = √(20² + 20²) = 20√2 = 28.284 m/s
The direction is
θ = tan⁻¹ (20/20) = tan⁻¹ 1 = 45°
Answer:
The ball travels at 28.3 m/s at 45° relative to the direction of the truck.
