A golfer hits a ball on a level fairway at an angle of 60° relative to the horizontal, and it lands on the green. Another golfer hits a ball with the same speed but at another angle, and it lands on the green by the other ball. What was the launch angle for the second golfer?
A) 30°
B) 20°
C) 45°
D) 40°
E) 10°

Question

Quizplus · Accepted Answer

The range of a projectile launched at an angle θ with a given speed is the same as that of a projectile launched at an angle (90° - θ) with the same speed. Since the first golfer hit the ball at 60°, the second golfer must have hit it at 30° to achieve the same range.

A Golfer Hits a Ball on a Level Fairway at an Angle