College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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An archer stands on a cliff with his bow 32.5 meters above a valley and fires an arrow with a mass of 35.1 grams straight upward.
- If the bow has an average “pull strength” of 131 N and the arrow travels 0.762 m (the “draw length”) before it leaves the bow, how much work does the bowstring do on the arrow?
- How much kinetic energy does the arrow have when it leaves the bow? How fast is it going?
- The arrow goes straight up, and since air resistance and wind can be neglected today, comes straight back down and lands in the valley below. Draw a diagram for its motion, and create formulas for the kinetic energy and potential energy of the arrow at three points: when it leaves the bow, at the peak of its motion, and when it hits the ground in the valley.
- Use energy methods to find how high the arrow gets.
- Use energy methods to find the speed of the arrow when it hits the ground.
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