Physics, 15.10.2020 07:01 Luchi8115

As a fish jumps vertically out of the water, assume that only two significant forces act on it: an upward force F exerted by the tail fin and the downward force due to gravity. A record Chinook salmon has a length of 1.50 m and a mass of 46.0 kg. If this fish is moving upward at 3.00 m/s as its head first breaks the surface and has an upward speed of 5.80 m/s after two-thirds of its length has left the surface, assume constant acceleration and determine the following. a. The salmon's acceleration
b. The magnitude of the force F during this interval N

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Answer from: iixyloa

$a = 12.32 \ m/s^2$

$F = 1017.52 \ N$

Explanation:

From the question we are told that

The length of the Chinook salmon is $l = 1.50 \ m$

The mass of the Chinook salmon is $m = 46.0 \ kg$

The upward velocity in water is $u = 3.00 \ m/s$

The upward velocity in air is $v = 5.80 \ m/s$

Generally from kinematic equations

v^2 = u^2 + 2as

=> $5.80^2 = 3.00^2 + 2 * a * [ [\frac{2}{3} * l ]$

=> $5.80^2 = 3.00^2 + 2 * a * [ [\frac{2}{3} * 1.5 ]$

=> 5.80^2 = 3.00^2 + 2 * a * [1 ]

=> $a = 12.32 \ m/s^2$

Generally magnitude of the force F during this interval in N is mathematically represented as

F = m (a + g )

=> F = 46.0 (12.32 + 9.8 )

=> $F = 1017.52 \ N$

Answer from: Quest

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Answer from: Quest

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As a fish jumps vertically out of the water, assume that only two significant forces act on it: an u...

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