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while performing a bench press, you slowly bring a 75 kg barbell down 0.52 meters from the rack down to your chest at a constant velocity. Unfortunately, you are unable to lift it back up. a) How much work do you perform lowering the bar to your chest? b) How much work does gravity do on the bar?

while performing a bench press, you slowly bring a 75 kg barbell down 0.52 meters from the rack down to your chest at a constant velocity. Unfortunately, you are unable to lift it back up. a) How much work do you perform lowering the bar to your chest? b) How much work does gravity do on the bar?

College Physics
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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while performing a bench press, you slowly bring a 75 kg barbell down 0.52 meters from the rack down to your chest at a constant velocity. Unfortunately, you are unable to lift it back up. a) How much work do you perform lowering the bar to your chest? b) How much work does gravity do on the bar?
Transcribed Image Text:while performing a bench press, you slowly bring a 75 kg barbell down 0.52 meters from the rack down to your chest at a constant velocity. Unfortunately, you are unable to lift it back up. a) How much work do you perform lowering the bar to your chest? b) How much work does gravity do on the bar?
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