iPad 12:33 AM * 70%-\' a session.masteringphysics.com Cryptocurrency M....Nexo (

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iPad 12:33 AM * 70%-' a session.masteringphysics.com Cryptocurrency M....Nexo (NEXO) All ICO Alert The onl... Enkidu nexo.io/assets/do...shipchain ico-Go.... MasteringPhysi... Problem 9.16 MasteringPhysics 10 of 12 A 25 kg air compressor is dragged up a rough incline from ri' = (1.31 + 1.3) m to r2 = (8.31 + 2.9) m, where the y-axis is vertical Part A How much work does gravity do on the compressor during this displacement? Express your answer with the appropriate units. W= | Value Units Reguest Answer Next

Explanation / Answer

the initial position vector

ri = 1.3 i + 1.3 j

rf = 8.3 i + 2.9 j

the work does gravity do on the compressor in only vertical direction, the displacemnt in vertical direction is

r = 2.9-1.3= 1.6 m

formula for work done by gravity is

W = F r cos theta = mg r cos theta = 25*9.8 ( 1.6) cos180 = -392 J

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