Question
If a high-diver performs a handstand dive (falls vertically) from a platform and enters the water 2.04 seconds later, through what displacement must the diver have fallen? Express your answer from the platform to the ground and indicate the displacment in this direction. Tip: Remember that any motion downwards is negative (-ve). Note 1: The units are not required to be included in this instance.
Answers
Anonymous
a =-g = -9.81 m/s^2
v = Vi + a t = 0 - 9.81 t
h = Hi + Vi t + (1/2) a t^2 = Hi + 0 -4.9 t^2
h = 0 at water
Hi = 4.9 t^2
Hi = 4.9 (2.04)^2 = 20.4 meters
d = displacement from top = -20.4 m
v = Vi + a t = 0 - 9.81 t
h = Hi + Vi t + (1/2) a t^2 = Hi + 0 -4.9 t^2
h = 0 at water
Hi = 4.9 t^2
Hi = 4.9 (2.04)^2 = 20.4 meters
d = displacement from top = -20.4 m