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Description: An archer using a simple bow exerts a force of 189 N to draw back the bow string 0.49 m. (Assume the given force is the force exerted at the very end of the pull.)(a)What is the total work (in J) done by the archer in preparing to launch her arrow? (

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter8: Potential Energy And Conservation Of Energy

Section: Chapter Questions

Problem 81AP: Repeat the preceding problem, but this time, suppose that the work done by air resistance cannot be...

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An archer using a simple bow exerts a force of 189 N to draw back the bow string 0.49 m. (Assume the given force is the force exerted at the very end of the pull.)

(a)

What is the total work (in J) done by the archer in preparing to launch her arrow? (Hint: Compute the total work as:

total work =

[F_final − F_initial]d.)

(b)

If all the work is converted into the kinetic energy of the arrow upon its release, what is the arrow's speed (in m/s) as it leaves the bow? Assume the mass of the arrow is 0.021 kg and ignore any kinetic energy in the bow as it relaxes to its original shape.

m/s

(c)

If the arrow is shot straight up, what is the maximum height (in m) achieved by the arrow? Ignore any effects due to air resistance in making your assessment. (Assume the arrow is initially 2 m from the ground.)

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