Consider the situation of the previous problem. Let the water push the left wall by a force F1 and the right wall by a force F2.
(a) F1 = F2
(b) F1 > F2
(c) F1 < F2
(d) the information is insufficient to know the relation between F1 and F2
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Solution
(b) F1 > F2
When the box is accelerated towards right, the water in the box experiences a pseudo force (ma) towards left, where m is the mass of water. So, the force F1exerted by the water on the the left wall of the box is greater.