Traditional Culture Encyclopedia - Photography and portraiture - Fangtongxue photography

Fangtongxue photography

0. 1 , 1.5 ,2.5

Test and analysis: O is the initial position, and the ball falls freely in the vertical direction. From O to A, there is:, so:;

The horizontal direction moves at a uniform speed, so there are:, find the solution; In the vertical direction, yes, yes, and then.