Question

CHW ch 3 Problem 3.32- Enhanced - with Feedback What was the bullet's fight time? Neglect the air resistance Express your answer with the appropriate units ㎜ Review I Constants I Penodic Table A rifle is aimed horizontally at a target 60 m away The bullet hits the target 2 5 cm below the aim point alue Submt incorrect: Try Again: 7 atempts remaining vPart B Whar e bulet's sperd aa it left the barre? Express your anawer with the appropriate units Eaucat Alehts reserv

Answer 1

Distance d = 60 m height below the aim, h = 2.5 cm time of flight t = ? initial velocity u = ? Consider vertical component S = U_y t + 1/2 a_y t^2 as uy = 0 s = h = 2.5 cm t = squareroot 2h/g = squareroot 2 times 0.025/9.8 = 0.071 sec considering horizontal component u = d/t = 60/0.071 = 845.07 m/s