A physics student on Planet Exidor throws a ball, and it follows the parabolic trajectory shown in $($Figure $1).$ The ball's position is shown at $1\mathrm{.}0$ s

intervals until t

$=3\mathrm{.}0$ s

$.$ At t

$=1\mathrm{.}0$ s

the ball's velocity has components vx

$=1\mathrm{.}8$ m$/$s

$,$ vy

$=1\mathrm{.}8$ m$/$s

$.$