An athlete throws a javelin at four different angles (20^o, 30^o, 50^o, and 70^o) above the horizontal, all with the same initial speed. For which two angles will the javelin land at the same distance from the throwing point? A) 20^o and 70^o B) 20^oand 50^o C) 20^o and 30^o D) 30^o and 50^o E) 30^o and 70^o

Question

Quizplus · Accepted Answer

The range of a projectile (like a javelin) thrown with a given initial speed is the same for complementary angles. The sum of complementary angles is 90 degrees. Therefore, 20 degrees and 70 degrees are complementary (20 + 70 = 90), and the javelin will land at the same distance for these two angles.

An Athlete Throws a Javelin at Four Different Angles (20o

An Athlete Throws a Javelin at Four Different Angles (20^o