Water jet machining is an advanced method for cutting plates using a high-velocity water jet mixed
with abrasive powder. The jet comes out of a nozzle A of diameter d and follows the path shown
through the plate''s thickness t. As the plate is moved to the right, the jet makes a narrow precision
slot in the plate. The water-abrasive mixture is used at the volume
ow rate of Q and has density
. Water comes out of the plate at 60% of its impinging nozzle velocity. Calculate the force F
required to hold the plate against the jet.