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## Homework Statement

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)?

## Homework Equations

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## The Attempt at a Solution

I know I don't have an attempt I am sorry, I really don't know what to do.