jet of water of diameter $60$ mm strikes a flat plate at $12$ m$/$s$.$ Given that the density of water is

$1000$ kg$/$m$3,$ calculate the force on the plate, when;

$($i$)$ The plate is stationary.

$($ii$)$ The plate moves in the same direction as the jet with a velocity of $5$ m$/$jet of water of diameter $60$ mm strikes a flat plate at $12$ m$/$s$.$ Given that the density of water is

$1000$ kg$/$m$3,$ calculate the force on the plate, when;

$($i$)$ The plate is stationary.

$($ii$)$ The plate moves in the same direction as the jet with a velocity of $5$ m$/$