A Ball Is Thrown Horizontally from the Top of a Building

Multiple Choice

A ball is thrown horizontally from the top of a building 0.10 km high. The ball strikes the ground at a point 65 m horizontally away from and below the point of release. What is the speed of the ball just before it strikes the ground?

A) 43 m/s
B) 47 m/s
C) 39 m/s
D) 36 m/s
E) 14 m/s