The duck always creates oscillations in the water with a frequency of 2.0 Hz. Under what conditions for wave speed and boat velocity will the wavelength of waves generated by the duck be 2.5 m and
the wavelength of waves observed by the man in the boat be 1.9 m? (Adjust all three sliders to achieve
the conditions above. Assume that the duck is moving rightward with a positive velocity).

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft

its lower due to the doppler effect.: apex