Let the coordinate origin be the projection of the highest point of shot put on the ground, the X axis is on the ground, along the direction of shot put, and the Y axis is vertical upward, then the parabolic equation can be written as follows.

y=ax^2-3

Let the shot put coordinate be (x 1, 1.6) and the placement point be (x2,0), then

x2-x 1= 10 ( 1)

And (x 1, 1.6) and (x2, 0) are all on the parabola, then

1.6=a*x 1^2-3 (2)

0=a*x2^2-3 (3)

A, x 1, x2 can be solved by connecting three equations.