A person fishing from a pier observes that 5 wave crests pass by in 6.1 s and estimates the distance between two successive crests to be 3.6 m. The timing starts with the first wave crest and ends with the last. What is the speed of the wave

the closer the planet is to the sun, the larger the gravity

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