Given,
The mass of the diver, m=70.0 kg
The height of the platform, h=3.0 m
The potential energy of a body is the product of the height at which the body is situated and the weight of the body.
That is the potential energy of the diver is given by,
[tex]E_P=\text{mgh}[/tex]Where g is the acceleration due to gravity.
On substituting the known values in the above equation,
[tex]\begin{gathered} E_P=70.0\times9.8\times3.0 \\ =2058\text{ J} \end{gathered}[/tex]Therefore the potential energy of the diver is 2058 J