What is the Work Done by a Pitcher on a Baseball?

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In summary, the conversation discusses the calculation of work done by a pitcher on a baseball thrown at a speed of 41.0 m/s and with a mass of 0.142 kg, ignoring air resistance. The equation used is (1/2)mv^2, which results in a work of 2.911 Joules. However, it is later discovered that the velocity should be squared, resulting in the correct answer of 119.351 Joules.
  • #1
goalieguy
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A baseball leaves a pitcher's hand at a speed of 41.0 m/s. The mass of the baseball is 0.142 kg . Ignore air resistance. How much work has the pitcher done on the ball in throwing it?

I've tried using (1/2)mv^2, but there has got to be something weird going on, or i could just be using the wrong equation


thanks for any and all help :smile:
 
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  • #2
work

i work it out and get the same thing every time i have tried it.
2.911 Joules is the answer I get, and WebAssign says that it is incorrect.
 
  • #3
How are you getting that answer? Show what you did.
 
  • #4
sorry

Sorry about not showing all the work.

I just take the givens: v=41.0 m/s m=0.142 kg

Then I plug it in to: [tex] \frac{m*v^2}{2} [/tex]

[tex] \frac{41*0.142}{2} [/tex]



That is the answer i come up with (2.911 Joules)
 
  • #5
square your 41, boy!
 
  • #6
duh. thanks i knew i was doing something completely dumb.
always got to forget the easy part.

right answer = 119.351 Joules

thanks a lot
 

FAQ: What is the Work Done by a Pitcher on a Baseball?

What is the role of a pitcher in a baseball game?

The pitcher is a key player in a baseball game, responsible for throwing the ball towards the batter from the pitcher's mound. Their main objective is to prevent the opposing team from scoring runs by delivering accurate and strategic pitches.

What factors affect the movement of a pitcher's ball?

The movement of a pitcher's ball is affected by several factors, including the grip on the ball, arm speed, and the release point. The type of pitch being thrown, such as a fastball or curveball, also plays a significant role in the movement of the ball.

How does a pitcher prepare for a game?

A pitcher prepares for a game by studying the opposing team's batters and developing a game plan. They also warm up their arm and practice different pitches before the game. Mental preparation, such as focus and visualization, is also important for a pitcher.

What is the difference between a starting pitcher and a relief pitcher?

A starting pitcher is typically the first pitcher in a game and is responsible for pitching a majority of the game. A relief pitcher, on the other hand, is brought in later in the game to replace the starting pitcher or to pitch in specific situations, such as when the game is close or there are runners on base.

How does a pitcher's performance affect the outcome of a game?

The performance of a pitcher can greatly impact the outcome of a game. A skilled and strategic pitcher can prevent the opposing team from scoring runs, giving their team a better chance of winning. On the other hand, a struggling pitcher may give up multiple runs and put their team at a disadvantage.

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