A baseball pitcher sends a fastball toward the batter with a speed of 40 m/s. The batter swings and misses, and the catcher brings the ball to rest by applying a constant force to it over a distance of 8.0 cm. Assume for simplicity that the ball (whose mass is 145 g) is traveling perfectly horizontally during the entire catch. Use the work-energy principle to determine the force that the catcher exerts on the ball. Determine how much time it took for the catcher to bring the ball to rest. Does the catcher do positive work or negative work on the ball while catching it? Explain your reasoning. Suppose that the catcher now throws the ball back to the pitcher. Do they do positive work or negative work on the ball while throwing it? Explain your reasoning.

A baseball pitcher sends a fastball toward the batter with a speed of 40 m/s. The batter swings and misses, and the catcher brings the ball to rest by applying a constant force to it over a distance of 8.0 cm. Assume for simplicity that the ball (whose mass is 145 g) is traveling perfectly horizontally during the entire catch. Use the work-energy principle to determine the force that the catcher exerts on the ball. Determine how much time it took for the catcher to bring the ball to rest. Does the catcher do positive work or negative work on the ball while catching it? Explain your reasoning. Suppose that the catcher now throws the ball back to the pitcher. Do they do positive work or negative work on the ball while throwing it? Explain your reasoning.

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College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

A baseball pitcher sends a fastball toward the batter with a speed of 40 m/s. The batter swings
and misses, and the catcher brings the ball to rest by applying a constant force to it over
a distance of 8.0 cm. Assume for simplicity that the ball (whose mass is 145 g) is traveling
perfectly horizontally during the entire catch.
Use the work-energy principle to determine the force that the catcher exerts on the ball.
Determine how much time it took for the catcher to bring the ball to rest.
Does the catcher do positive work or negative work on the ball while catching it? Explain
your reasoning.
Suppose that the catcher now throws the ball back to the pitcher. Do they do positive
work or negative work on the ball while throwing it? Explain your reasoning.

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