Question

Robin Hood aims his longbow horizontally at a target' bull' eye 30 m away. If the arrow strikes the target exactly 1.0m below the bull'* eye, how fast did the arrow move as it was shot from the bow? Assume air resistance is negligible.

(A) 6.0m/*

(B) 13m/*

(C) 33m/*

(D) 67m/*

(E) 150m/*

Answer 1

Correct option (D) 67m/s

For a horizontal projectile (viy = 0 m/*) to fall 1m takes (using 1m = gt2) 0.45 seconds. To travel 30m in this time requires a speed of d/t = (30m)/(0.45s)