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

a

b

Explanation:

From the question we are told that

  The  length of the Chinook salmon is  

   The mass of the Chinook salmon is

   The  upward velocity in water is  

    The  upward velocity in air is

Generally from kinematic equations

=>    

=>  

=>        

=>    

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

=>    

=>    

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.