Question

Rank the launch angles for the five paths in the figure below with respect to time of flight, from the shortest time of flight to the longest –

• A. 15⁰, 30⁰, 45⁰, 60⁰, 75⁰
• B. 75⁰, 60⁰, 45⁰, 30⁰, 15⁰
• C. 15⁰, 75⁰, 30⁰, 60⁰, 45⁰
• D. 30⁰, 60⁰, 15⁰, 45⁰, 75⁰

Answer 1

Answer: (A)

15⁰, 30⁰, 45⁰, 60⁰, 75⁰

Answer 2

15⁰, 30⁰, 45⁰, 60⁰, 75⁰. The greater the maximum height, the longer it takes the projectile to reach that altitude and then fall back down from it. So, as the launch angle increases, the time of flight increases.