A 44.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 144 m/s from the top of a cliff 152 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.) 5.217e+05 (b) Suppose the projectile is traveling 102.1 m/s at its maximum height of y = 368 m. How much work has been done on the projectile by air friction? -1.33e+05 (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? 90.1
A 44.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 144 m/s from the top of a cliff 152 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.) 5.217e+05 (b) Suppose the projectile is traveling 102.1 m/s at its maximum height of y = 368 m. How much work has been done on the projectile by air friction? -1.33e+05 (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? 90.1
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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