Answer:
F= + 1,131 kgF
Step-by-step explanation:
performing an energy balance we have:
(1)
where:
m= mass of the diver = 50 kg
g = acceleration of gravity = 9.81 m/s2
h = maximum height = 4.6 m
V= speed reached before entering the water.
Simplifying ecuation (1):

(downward)
To calculate the average force exerted on the diver, We will use te formula:
F=m*a
At the same time:

Where:
Vo= Speed before entering the water = -9.50 m/s
Vf = Speed after diver stops = 0 m/s
t= time to reach rest = 0.42 s
So;
(upward)
F = m*a = 50kg*(+22.62m/s2) = +1131 kgF (upward)