TP 4.26

Given:

x₀ = 0,  y₀ = 0, y = 0 (assuming that the origin of your coordinate system is located at the level the ball is kicked and landed)

q = 25.0^o 

v₀ = 9.50 m/s                         

Find:         t

Physics:    projectile motion

Solve:

v_0x = v₀ cosq = (9.50 m/s) cos(25.0^o) = 8.61 m/s

v_0y = v₀ sinq = (9.50 m/s) sin(25.0^o) = 4.01 m/s

 

y = y₀ + v_0yt – ½ g t²

0 = 0 + v_0yt – ½ g t²

0 = t(v_0y – ½ g t)

v_0y – ½ g t = 0

t = 2 v_0y /g = 0.819 s