A High-Speed Dart Is Shot from Ground Level with a Speed

Multiple Choice

A high-speed dart is shot from ground level with a speed of 150 m/s at an angle 30° above the horizontal.What is the vertical component of its velocity after 4.0 s if air effects can be neglected?

A) 150 m/s
B) 36 m/s
C) 130 m/s
D) 75 m/s
E) 38 m/s