A barge is in a rectangular lock on a freshwater river. 1be lock is 60.0 m long and 20.0 m wide, and the steel doors on each end are closed. With the burgee floating in the lock, a 2.50 X 10 N load of scrap mew is put onto the burgee. 1be mew bas density 9000 kg/m3
(a) When the load of scrap mew, initially on the bank, is placed onto the barge, what vertical distance does the water in the lock rise?
(b) The scrap metal is now pushed overload into the water. Does the water level in the lock rise, fall, or remain the same? If it rises or falls, by what vertical resistance does it change?