Question

When a salmon swims up a river to breed, it often has to jump up waterfalls. The figure shows a salmon jumping above the surface of the water. On this occasion the salmon falls back down into the river.
The salmon has a mass of 2.0 kg.
a)the salmon leaves the water vertically with a kinetic energy of 16.2J
calculate the maximum height gained by the salmon,ignore air resistance.

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Answer 1

Answer:

0.826 m

Explanation:

potential energy = Kinetic energy

$\frac{1}{2} m {v}^{2} \: = \: mgh$

16.2 = 2 * g * h

= 2 * 9.8 * h

= 19.6 h

$h \: = \frac{16.2}{19.6}$

h = 0.826 m