$6-102$ A water jet strikes a stationary horizontal plate verti$-$

cally at a rate of $18$ kg$/$s with a velocity of $20$ m$/$s$.$ The mass

of the plate is $10$ kg$.$ Assume the water stream moves in the

horizontal direction after the strike. 'The force needed to pre$-$

vent the plate from moving vertically is

$($a$)186$ N $($b$)262$ N $($c$)334$N $($d$)410$N $($e$)522$N