A projectile is fired horizontally from a height of 20 m with an initial speed of 15 m/s. How far horizontally from the launch point does it land? Use g = 9.8 m/s² and ignore air resistance.
A13.5 m
B30.3 m
C294 m
D60.6 m
Explanation
📌 Time to fall: 20 = ½(9.8)t² → t² = 4.08 → t = 2.02 s. Horizontal distance: d = v·t = 15 × 2.02 = 30.3 m. Distractor A used t = 20/g = 2.04 with some error; C used v × height (dimensional mix); D doubled the correct answer (forgot to take square root or extra factor of 2).