The boy on the tower throws a ball 20m downrange. what is his pitching speed?

The pitching speed of the ball is 19.7 m/s

Explanation:

Here, we can use the third equation of motion,  whereas v represents the final velocity, u represents initial velocity, a is the acceleration due to gravity and s is the displacement or distance an object traveled Here, the initial velocity of the the ball is given as  zero and the acceleration due to gravity is 9.8  , the distance 's' is given as 20 m Using the equation,   Hence, the pitching speed of the ball is 19.7 m/s

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