Question

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

Answer 1

Answer:

The pitching speed of the ball is 19.7 m/s

Explanation:

• Here, we can use the third equation of motion,  $v^{2} = u^{2} - 2as$

• 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,  $v^{2} = 2 * 9.8 * 20 = 392\\v = \sqrt{392} = 19.7m/s$

• Hence, the pitching speed of the ball is 19.7 m/s