he total$-$body angular momentum of a diver changes from zero to some significant value $($positive or negative

depending on the type of dive$)$ during the takeoff phase. Miller and Munro $(1985)$ reported that Greg Louganis had an

angular momentum at takeoff of $-65$ kg$$m$2/$s in the forward $3\mathrm{.}5-$somersault dive performed in the closed pike position,

an angular momentum of $50$ kg$$m$2/$s in the reverse $2\mathrm{.}5-$somersault dive in the open pike position, and an angular

momentum of $-19$ kg$$m$2/$s in a straight forward dive $($layout$).$

a$.$ What does a negative angular momentum indicate? Why does the magnitude of the angular momentum differ for the

three dives?