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If you have the book, p. 101 #14
How long will it take the ball in Experiment 2* to reach the ground if it were released at point A (closest to center of axis) will a speed of sqrt2gL?
The answer sets up delta y = 1/2gt^2 = 2L and solves for t
I understand the 1/2gt^2 part, but where did 2L come from? It must be related to the speed but I can't see how exactly...
*Experiment 2 = student takes a ball and string and swings the ball in a vertical circle such that the ball nearly hits the floor
How long will it take the ball in Experiment 2* to reach the ground if it were released at point A (closest to center of axis) will a speed of sqrt2gL?
The answer sets up delta y = 1/2gt^2 = 2L and solves for t
I understand the 1/2gt^2 part, but where did 2L come from? It must be related to the speed but I can't see how exactly...
*Experiment 2 = student takes a ball and string and swings the ball in a vertical circle such that the ball nearly hits the floor
