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2 years ago

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

Physics

1 answer:

san4es73 [151]2 years ago

5 0

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

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Answer:

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2 years ago

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Momentum before the collision:
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valkas [14]

Answer

given,

height of window = 4 m

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$s = ut + \dfrac{1}{2}at^2$

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