A boxcar of length 7.8 m and height 2.3 m is at rest on
frictionless rails. Inside the boxcar (whose mass when empty is
2900 kg) a tank containing 1400 kg of water is located at the
left end. The tank is 1 m long and 2.3 m tall. At some point
the walls of the tank start to leak, and the water fills the floor
of the boxcar uniformly. Assume that all the water stays in
the boxcar. What is the displacement of the boxcar 9 s after
the water has settled in the bottom of the car (take positive
displacement as being to the right)?
The Attempt at a Solution
I know I don't have an attempt I am sorry, I really don't know what to do.