As you stand at the end of a diving board, the board bends downward. While you slowly bend your knees and prepare to jump, the board doesn't move. Finally, when you begin to jump upward, the board
A. moves upward since the board's restoring force is in the direction of its unbent equilibrium position.
B. moves downward since you must apply a downward force on the board larger than your weight in order to jump upward.
C. moves upward since your weight is no longer there to hold the board down.
D. stays in the same position since the restoring force provided by the spring board balances your weight.
Answer:B
As you stand at the end of a diving board, the board bends downward. While you slowly bend your knees and prepare to jump, the board doesn't move. Finally, when you begin to jump upward, the board
A. moves upward since the board's restoring force is in the direction of its unbent equilibrium position. B. moves downward since you must apply a downward force on the board larger than your weight in order to jump upward. C. moves upward since your weight is no longer there to hold the board down. D. stays in the same position since the restoring force provided by the spring board balances your weight.