When will the ball hit the ground? {{CMD_22}} To determine when the ball hits the ground we need to solve the equation {{MATH_23}} for t. That is, {{ENV_24}} This equation has two solutions, one of them is {{MATH_25}} seconds. Since the ball hits the ground some time after it's thrown, we conclude that the ball hits the ground at time when {{MATH_26}}. The ball will hit ground at the time {{MATH_27}} {{CMD_28}}