Question

There is an opening of area a near bottom of a vessel containing liquid upto height h.Liquid is of density



d.A disc is held against opening to keep liquid from running out.Liguid exerts a force f on disc.If disc is movef by a short distance from opening emerging liquid strike disc with force

Answer 1

hence the wrk done in the process is gain in kinetic energy

• let l be the dist moved by the disc,,then F.l=1/2 x m v²
• 1/2 x [dxaxl]{√[2gh]}²
• F=adgh
• correct me if its wrong