A pitcher accelerates a 0.14-kg hardball fromrest to 42.5 m>s in 0.060 s. (a) How much work does the pitcherdo on the ball? (b) What is the pitcher’s power output during thepitch? (c) Suppose the ball reaches 42.5 m>s in less than 0.060 s.Is the power produced by the pitcher in this case more than, lessthan, or the same as the power found in part (b)? Explain

University Physics Volume 1
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Author:William Moebs, Samuel J. Ling, Jeff Sanny
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Chapter7: Work And Kinetic Energy
Section: Chapter Questions
Problem 72P: A 500-kg dragster accelerates from rest to a final speed of 110 m/s in 400 m (about a quarter of a...
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  A pitcher accelerates a 0.14-kg hardball from
rest to 42.5 m>s in 0.060 s. (a) How much work does the pitcher
do on the ball? (b) What is the pitcher’s power output during the
pitch? (c) Suppose the ball reaches 42.5 m>s in less than 0.060 s.
Is the power produced by the pitcher in this case more than, less
than, or the same as the power found in part (b)? Explain

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