A ball is thrown so that the motion is defined by the equations $x=5\mathrm{.}800t$ and $y=2+6t-4\mathrm{.}9t^2,$ where $x$ and $y$ are

expressed in meters and $t$ is expressed in seconds.

Determine the magnitude and angle of the velocity at $t=1s.($Round the velocity value to three decimal places.$)$

The magnitude of velocity at $t=1s$ is

$\frac{m}{s}$ and the angle is