When a salmon swims up a river to breed, it often has to jump up waterfalls. Fig. 3.1 shows a salmon jumping above the surface of the water. On this occasion the salmon falls back down into
the river.
salmon
waterfall
river
Fig. 3.1
The salmon has a mass of 2.0kg.
(a) The salmon leaves the water vertically with a kinetic energy of 16.2J.
(1) Calculate the speed of the salmon as it leaves the water.
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