Задача 10117.

Soccer ball is sent with an initial speed of 14.5 m / s at an angle of 45 degrees cast. At the same moment the player is in 55 m from the premises of the ball, rushes forward to meet the ball. How fast he has to run in order to have time to grab the ball before it hits the ground?

Detailed solution shorthand terms, formulas and laws used in the decision, the withdrawal of the calculation formula and the response.