Question

Time in air Five balls are all at the same height near the surface of Earth. One is dropped from rest but the others are launched horizontally. Using the information given in the table below, state how long it will take for each ball to fall to the ground after being launched. Ignore air drag. Ball 1 Ball 2 Ball 3 Ball 4 Ball 5 0.2 18 (m/s) At 0.6 x-velocity A projectile is fired into the air and strikes the ground 10 s later. Fill inhble below. Ignore air drag. At 0 1.4 3.3 5.3 9.1 45.1 (m/s)

PLEASE EXPLAIN BOTH QUESTION STEP BY STEP. THANK YOU SO MUCH.

Answer 1

V_0 x = 36 m/s, v_0 y = 0 m/s Delta y = 72 m use ! Delta y = V_0 y t + 1/2 gt^2 i.e. 72 = 0 + 4.9 t^2 implies t = 3.83 s Delta x = v_0 x t = 36 times 3.83 TildeEqual 138 m v_x = v_0 x = 36 m/s v_y = v_0 y + gt = 0 + (9.8) (3.83) = 37.53 m/s therefore v = squareroot v_x^2 + v_y^2 TildeEqual 52 m/s theta = tan^-1 (v_y/v_x) = 46.2 degree below the horizontal