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 1.5 m and a mass of 61 kg. If this fish is moving upward at 3 m/s as its head first breaks the surface and has an upward speed of 7 m/s after two-thirds of its length has left the surface, assume constant acceleration and determine: The salmon's acceleration. m/s2 The magnitude of the force 'F' during this interval. N