Question

Mature salmon swim upstream, returning to spawn at their birthplace. During the arduous trip they leap vertically upward over waterfalls as high as 2.81 m. With what minimum speed (in m/s) must a salmon launch itself into the air to clear a 2.81-m waterfall?

Answer 1

Using 3rd equation of motion,

V^2 = u^2 + 2gh

0 = u^2 - (2 x 9.8 x 2.81)

Velocity, u = 7.42 m/s

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