A cork and a metal bob are connected by a string as shown in the figure. If the beaker is given an acceleration towards left, then the cork will be thrown towards

Due the the action of pseudo force acting on the water , more water will be accumulated on the rear side of the container as a result the free surface of water will be inclined downwards to the front side, Buoyant force acting on the cork is perpendicular to the free surface of water , so the string becomes perpendicular to the free surface of water.