A standing wave is formed in a string as pictured in problem 1. If a standing wave with two segments is formed when the frequency is 60 Hz, and the hanging mass and string length are kept constant, what frequency would be required to produce a standing wave with 7 segments?

no sign of dia of fuel cell

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