What is the initial speed of the object?

It depends on the velocity of the moving object. (50 ms)

Explanation:

For example, a ball moves at the speed of 50 newtons per minute depending on the specific circumstances such as air resistance, the size of the ball, the weight of the ball, etc. A further explanation is provided here:

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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