The sand bag is placed on a trolley that is moving with a uniform speed of \(27 \;km/h\). The external forces acting on the system of the sandbag and the trolley is zero. When the sand starts leaking from the bag, there will be no change in the velocity of the trolley. This is because the leaking action does not produce any external force on the system. This is in accordance with Newton’s first law of motion.
Hence, the speed of the trolley will remain \(27 \;km/h\).
What inference do you draw about the behaviour of Ag+ and Cu2+ from these reactions?
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