Question

A football is kicked at ground level with a speed of 10.0 m/s at an angle of 33.0° to the horizontal. How much later does it hit the ground?

Answer 1

Let's use the y axis for this one:
\[y_i = o\]
\[y_f = o\]
\[v_{iy} = 10\sin33\]
\[a = -9.8\]
Plug in displacement formula:
\[y_f = y_i+v_i t +\frac{ at^2 }{ 2 }\]