A diving board 3.00 m long is secured at the ladder end, supported at a point 1.00 m from the ladder end, and a 500 N diver stands at the far end. The diving board itself has a uniform composition and weighs 280 N. Find the force on the diving board at the support poi nt and the force at the ladder end.

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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

the moving of the box is a result of centripetal force. think of that  as a car or a truck in this case creates a turn, the force of friction performing upon the turned wheels of the car runs centripetal force obligatory for circular motion for the things inside it.