can u help me plz im not good at pshycics?

Question

A 69 kg diver jumps off a 10.4 m tower.
(a) Find the diver's velocity when he hits the water.
m/s __________
(b) The diver comes to a stop 2.0 m below the surface. Find the net force exerted by the water.
___________Newtons

Answer 1

We'll use kinematics to solve this one.

For the first, use the equation

2 a d = V^2 - V0^2

a acceleration is 9.8 m/s^2
d distance is 10.4 m
VO is zero (the diver starts from rest)
solve for V

For the second, use the same equation. This time,
VO = the V you got above
V = 0 (final velocity is zero)
d = 2.0 m
solve for acceleration a

Then use Newton's 2nd Law F = ma to find the force.