A 58.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 128 m/s from the top of a cliff 116 m above level ground, where the ground is taken to be y = 0. (a) What is the initial total mechanical energy of the projectile? (Give your answer to at least three significant figures.) 541070.4 ✓ J (b) Suppose the projectile is traveling 90.7 m/s at its maximum height of y = 287 m. How much work has been done on the projectile by air friction? -139371.4 J (c) What is the speed of the projectile immediately before it hits the ground if air friction does one and a half times as much work on the projectile when it is going down as it did when it was going up? 81.5 m/s

A 58.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 128 m/s from the top of a cliff 116 m above level ground, where the ground is taken to be y = 0. (a) What is the initial total mechanical energy of the projectile? (Give your answer to at least three significant figures.) 541070.4 ✓ J (b) Suppose the projectile is traveling 90.7 m/s at its maximum height of y = 287 m. How much work has been done on the projectile by air friction? -139371.4 J (c) What is the speed of the projectile immediately before it hits the ground if air friction does one and a half times as much work on the projectile when it is going down as it did when it was going up? 81.5 m/s

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Description: A 58.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 128 m/s from the top of a cliff116 m above level ground, where the ground is taken to be y = 0.(a) What is the initial total mechanical energy of the pr

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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